REVIEWING CHEMICAL BONDING XI QUIZ

CHEMICAL BONDING XI

1. The following compounds which can be classified as polar molecules are ....

a. CO2, BF3, CH4

b. H2O, NH3, PCl3

c. PCl5, CCl4, BeCl2

d. BeCl2, CHCl3, HF

e. H2S, CS2, Cl2O

2. One of the following substances which has a non permanent dipoles is ....

a. ammonia

b. water

c. hydrogen chloride

d. carbon dioxide

e. hydrogen sulfide

3. A group of compounds which have a hydrogen bond is ....

a. HCl, HBr, HI

b. HF, NaF, NF3

c. NH3, H2O, C2H5OH

d. CH3OH, HF, H2SO4

e. CH4, C2H6, C3H8

4. A molecule with the formula AX₄ is found to be nonpolar. The shape of AX4 is ....

a. tetrahedral

b. seesaw

c. square planar

d. either tetrahedral or square planar

e. either tetrahedral or seesaw

5. The type of hybrid orbitals used for phosphorus to describe the bonding in PH₃ is ....

a. sp

b. sp²

c. p³

d. sp³

e. sp³d

6. Trigonal planar geometry is described by which type of hybrid orbitals on the central atom?

a. sp³

b. spd

c. sp³d²

d. sd³

e. sp²

7. A molecule whiich has the greatest angle between bonds is ....

a. H₂O

b. PH₃

c. BF₃

d. CH₄

e. NH₃

8. The angle between N-H bonds in NH₃ is closer to ....

a. 109^o

b. 120^o

c. 90^o

REVIEWING CHEMICAL BONDING X QUIZ

CHEMICAL BONDING (X)

1. When a reaction occurs between atoms with ground-state electron configurations of (2,1) and (2,7), the bond formed is mainly ….

a. ionic

b. metallic

c. polar covalent

d. nonpolar covalent

e. coordinate covalent

2. Which compound contains a covalent bond?

a. HCl

b. NaCl

c. KF

d. BaO

e. Li₂O

3. When a reaction occurs between atoms with electron configurations of (2,8,5) and (2,7), the bond formed is mainly ….

a. ionic

b. polar covalent

c. metallic

d. coordination

e. nonpolar covalent

4. When ammonia, NH3 reacts with hydrogen chloride, HCl forms ammonium chloride, NH4Cl. The kind of bonds of this product are ....

a. covalent and ionic

b. polar covalent and ionic

c. polar covalent and coordinated covalent

d. non polar covalent and polar covalent

e. polar covalent, coordinate, ionic

5. Molecular formulas which all of them can be classified as non polar molecules are ...

a. BF3, CO2, NH3, H2O

b. HF, HCl, HBr, HI

c. O2, CH4, CCl4, BF3

d. CHCl3, CF2Cl2, CO2, CS2

e. XeF4, H2S, Cl2, Br2

6. Metallic bonding occurs between atoms of ….

a. sulfur

b. fluorine

c. copper

d. carbon

7. Metallic bonding occurs between metal atoms that have ….

a. full valence orbitals and low ionization energies

b. full valence orbitals and high ionization energies

c. vacant valence orbitals and low ionization energies

d. vacant valence orbitals and high ionization energies

8. The highest melting point of the following substances is ....

a. sulfur

b. helium

c. salt

d. acid

e. non metal oxide

NON POLAR COVALENT BONDING TASK

After you learn quite a lot about an ionic bond, now think another bond, that is a covalent bond.
Look at the picture, the simplest example is a hydrogen molecule. Compare this bond with ionic bond, such as in table salt, NaCl.
Is there any electron transfer in the bond between hydrogen atoms? Are you sure there is no electron transfer at all? What is the reason? Hydrogen is a non metal, so the bond is really different with NaCl, because sodium is a metal. Its OK, good point.
As before, your task is, make paragraphs which consist of clear explanation about the bond oh H2 molecules. Don't forget to mention Lewis structure, duplet rule, single covalent bond, and non polar covalent bond, including the reason of each clarification. Then apply this concept to another similar molecule, such as chlorine molecules.

CHEMICAL BONDING PROBLEMS

Please look at this picture and think carefully. Can you imagine and predict what kind of substance is that. OK students, keep thinking please. Do you think that is a substance which we call as a compound? Why do you think that is a kind of compound? Is that because it consists of two different particles? OK, it's right, good point.
Now, please think about the other thing, that is something which can hold all the particles together into the manner. To find the answer, use the information about anion and cation. To make simple, you can explain your answer by using examples, such as the anion is chloride, Cl- and the cation is sodium ion, Na+. You can write down your explanation and you can edit your answer latter. Use your knowledge about atomic structure, periodic properties, and chemical bonding. Do the best, please.

THE ANSWER OF CHEMICAL BONDING QUIZ XI Part II

11.The following substances which has the lowest melting point is ….
d.butane, C4H10
Answer : e.salt, NaCl
12.Which of the following is arranged in order of increasing boiling points?
Answer : c.H2S, H2Se, H2O
13.How can the physical properties of substances be explained?
Answer : b.In terms of intermolecular forces only
14. In general, what do the physical properties of substances include?
Answer : b.conductivity, malleability, solubility, hardness, melting and boiling point only
15.The boiling point of water is about 200°C higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?
Answer : b.the intermolecular attractive forces are much greater in water than in hydrogen sulfide and hydrogen selenide.
16.The boiling point of CH4 is much lower than that of HF. This is because ….
Answer : c.of hydrogen bonding in HF
17.Based on the following information:
CF4, Molecular Weight 87.99, Normal Boiling Point -182°C
CCl4, Molecular Weight 153.8, Normal Boiling Point -123°C
The reason that CCl4 has a higher boiling point than CF4 is that ....
Answer : c.CF4 molecule have a greater polarizability
18.The wrong statement about methane, ammonia, and water is ….
Answer : e.the molecule shape of ammonia is pyramid
19.If the molecules of BF3 and NH3 are compared one of another, the correct answer is ....
Answer : b.BF3 doesn’t have lone pair electron
20.The hybridization state of PCl5 is ….
Answer : c.sp3d

THE ANSWER OF CHEMICAL BONDING QUIZ X Part III

1.Which substance contains nonpolar covalent bonds?
Answer : a. Cl2
2.Which type of substance is soft, has a low melting point, and is a poor conductor of heat and electricity?
Answer : c. molecular solid
3.Which substance contains coordinate bond?
Answer : a. NH4Cl
4.The correct answer of the dot electrons with an arrow is ….
Answer : c. co-ordinate bond
5.Which molecule is nonpolar?
Answer : b. CO2
6.Which bond has the highest degree of polarity?
Answer : a. HF
7.Which of the following molecules is polar?
Answer : c. H2S
8.Molecular polarity can be determined by the ….
Answer : c. distribution of charge
9.Which characteristic is a property of molecular substances?
Answer : a. low boiling point
10.What is used to assess the degree of polarity in the bond?
Answer : b.electronegativity difference of the two bonded atoms
11.Which of the following statements is (are) incorrect?
Answer : e. CH4 is an asymmetrical molecule
12.Metallic bond is the bond occurs between ….
Answer : d.metal
13.The correct statement about metallic bond is the bond between ….
Answer : d.positive ions of metals and electrons’ current
14.Which statement describes a chemical property of iron?
Answer : d. Iron combines with oxygen to form rust
15.The effect of electrons’ current in metal is ….
Answer : c.electrons move freely
16.Metallic bonding occurs between atoms of ….
Answer : c. copper
17.Metallic bonding occurs between metal atoms that have ….
Answer : c. vacant valence orbitals and low ionization energies
18.Which characteristic is a property of metallic substances?
Answer : d. relatively low solubility
19.Which of the following Period 4 elements has the most metallic characteristics?
Answer : a. K
20.Which of the following elements has the most metallic characteristics?
Answer : c. Na

THE ANSWER OF CHEMICAL BONDING QUIZ X Part II

1. Which substance contains a bond with the greatest ionic character?
Answer : a. KCl
2. What do ionic solids have between particles?
Answer : a. very strong ionic bonds
3. Which substance conducts electricity when melted but not when solid?
Answer : b. an ionic compound
4.An element with an electronegativity of 0.9 bonds with an element with an electronegativity of 3.1. Which phrase best describes the bond between these elements?
Answer : c.mostly covalent in character and formed between two nonmetal
5. Which compound has the highest melting point?
Answer : b. NaCl
6.Which is not an identity of the bond formed between 2 hydrogen atoms?
Answer : d.double covalent bond
7.One valence electron from each chlorine atoms are shared.How many valence electrons are shared in a double bond?
Answer (a. 2)
8.A triple bond is formed when ….
Answer : c. 3 pairs of electrons are shared.
9. In a multiple covalent bond ….
Answer : b.more than one pair of electrons is shared between two atoms.
10. HCl is formed ….
Answer : a. when 1 pair of valence electrons is shared, one from the hydrogen atom and one from the chlorine atom.
11. The electrons in the bond between hydrogen and flourine are more strongly attracted to the atom of ….
Answer : b.fluorine, which has the higher electronegativity
12. Which compound contains a covalent bond?
Answer : a. HCl
13. When a reaction occurs between atoms with electron configurations of (2,8,5) and (2,7), the bond formed is mainly ….
Answer : b. polar covalent
14. In which compound do atoms form bonds by sharing electrons?
Answer : a. H2O
15. What is the maximum number of covalent bonds that a carbon atom can form?
Answer (d. 4)
16. Which pair of bonds will share electrons when a bond is formed between them?
Answer : b. Br and Cl
17. Which substance contains nonpolar covalent bonds?
Answer : a. H2
18. Which compound contains both ionic and covalent bonding?
Answer : c. KNO3
19. Silicon dioxide (SiO2) and diamonds are best described as ….
Answer : c. network solids with covalent bonding

THE ANSWER OF CHEMICAL BONDING QUIZ X Part I

1.lewis structure of an atom shows ....
Answer : b.electrons in the outermost shell
2.How many dots are to be around Ne in its Lewis structure?
Answer (e.8)
3.Which element attains the structure of a noble gas when it becomes a 2+ ion? Answer : b.Ba
4.Which element attains the structure of a noble gas when it becomes a l+ ion?
Answer : a.K
5.How many dots would the electron dot-diagram of Mg2+ have?
Answer (b.2)
6.Which of the following atoms has the greatest tendency to attract electrons?
Answer : e.bromine
7.The distribution of charge is determined by the use of ….
Answer : e.valence shells
8.What do the following have in common? 20Ne 19F- 24Mg2+
Answer : d.They are isoelectronic with each other.
9.When bromine gains one electron it ….
Answer : b.becomes a negative ion with a larger radius
10.Which of the following substances does not belong to the major categories of compounds?
Answer : b.Li
11.In ionic bonds, nonmetals are most likely to ….
Answer : a.gain electrons
12.When a potassium atom reacts with bromine, the potassium will ….
Answer : a.lose only 1 electron
13.The negative ion F- has the same electronic configuration as the positive ion ….
Answer : c.Mg2+
14.Ionic bonds are formed when ….
Answer : b.valence electrons are transferred from one atom to another
15.When a reaction occurs between atoms with ground-state electron configurations of (2,1) and (2,7), the bond formed is mainly ….
Answer : a.ionic
16.Which compound contains ionic bonds?
Answer : b.CaO
17.Lithium and chloride react to form LiCl, an ionic compound. The chloride ion has ____ electrons in its outermost occupied shell.
Answer (d.8)
18.When a sodium atom reacts with a chlorine atom to form a compound, the electron configurations of the ions forming the compound are the same as those in which noble gas atoms?
Answer : d.neon and argon

THE ANSWER OF CHEMICAL BONDING QUIZ XI Part I

1.What substances have intermolecular forces?
Answer : c.molecules
2.The following elements which have stronger London forces is ….
Answer : e.Kr
3.The following substances which has the strongest London forces is ….
Answer : d.butane, CH3CH2CH2CH3
4.One of the following chemical bonds is very weak and is independent of the type of element involved. This chemical bond is ….
Answer : e.Van der Waals
5.At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is a solid. The reason is ....
Answer : b.dispersion interactions increase with molecular size.
6.The following pairs which show dipole-dipole forces are ….
Answer : e.HCl and HBr
7.Hydrogen bonding is an example of a ....
Answer : b.strong intermolecular force
8.The following substances which displays intramolecular hydrogen bonding is ….
Answer : b.CH3OH
9.The following molecules which shows the greatest effects of intermolecular forces is ….
Answer : e.H2O
10. The compound which has the highest boiling point is ....
Answer : a.HF

CHEMICAL BONDING QUIZ XI Part II

11.The following substances which has the lowest melting point is ….
a.gold, Au
b.sand, SiO2
c.water, H2O
d.butane, C4H10
e.salt, NaCl
12.Which of the following is arranged in order of increasing boiling points?
a.CH4, HF, O2
b.HF, HCl, HBr
c.H2S, H2Se, H2O
d.H2O, He, N2
e.HF, H2O, NH3
13.How can the physical properties of substances be explained?
a.In terms of chemical bonds only
b.In terms of intermolecular forces only
c.In terms of chemical bonds and intermolecular forces
14.In terms of ionic bonding only
In general, what do the physical properties of substances include?
a.conductivity, malleability, solubility and hardness only
b.conductivity, malleability, solubility, hardness, melting and boiling point only
c.conductivity, solubility, hardness, melting and boiling point only
d.solubility, hardness, melting and boiling point only
15.The boiling point of water is about 200°C higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?
a.the H-O covalent bond is much stronger than the H-S and H-Se bonds.
b.the intermolecular attractive forces are much greater in water than in hydrogen sulfide and hydrogen selenide.
c.the water molecule is lighter than the other two molecules.
d.water has the lowest molecular weight.
e.water is less polar than hydrogen sulfide and hydrogen selenide.
16.The boiling point of CH4 is much lower than that of HF. This is because ….
a.CH4 is polar
b.HF is more polarizable.
c.of hydrogen bonding in HF
d.of dipole-dipole interactions in CH4
e.the molecule of HF linier
17.Based on the following information:
CF4, Molecular Weight 87.99, Normal Boiling Point -182°C
CCl4, Molecular Weight 153.8, Normal Boiling Point -123°C
The reason that CCl4 has a higher boiling point than CF4 is that ....
a.CCl4 molecules are more polar
b.CF4 molecules are more polar
c.CF4 molecule have a greater polarizability
d.CCl4 molecules have a greater polarizability
e.electronegativity of F atom is greater than Cl atom
18.The wrong statement about methane, ammonia, and water is ….
a.each molecule has certain shape
b.the geometry of methane is tetrahedral
c.the hybridization state of H2O is sp3
d.all molecules have the same geometry
e.the molecule shape of ammonia is pyramid
19.If the molecules of BF3 and NH3 are compared one of another, the correct answer is ....
a.BF3 is polar
b.BF3 doesn’t have lone pair electron
c.NH3 is non polar
d.NH3 has lone pair electron
e.The hybridization state of NH3 is sp2
20.The hybridization state of PCl5 is ….
a.sp
b.sp3
c.sp3d
d.sp2
e.sp3d2

CHEMICAL BONDING QUIZ XI Part I

1.What substances have intermolecular forces?
a.Metals
b.Ionic compounds
c.molecules
d.a and b
e.b and c
2.The following elements which have stronger London forces is ….
a.Ne
b.Ar
c.H2
d.He
e.Kr
3.The following substances which has the strongest London forces is ….
a.methane, CH4
b.ethane, CH3CH3
c.propane, CH3CH2CH3
d.butane, CH3CH2CH2CH3
e.isobutane, CH3CH(CH3)2
4.One of the following chemical bonds is very weak and is independent of the type of element involved. This chemical bond is ….
a.ionic
b.covalent
c.hydrogen
d.dipole-dipole
e.Van der Waals
5.At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is a solid. This is because ....
a.polarity increases with molecular size.
b.dispersion interactions increase with molecular size.
c.dipole-dipole interactions increase with molecular size.
d.dipole-induced dipole interactions increase with molecular size.
e.dispersion interactions increase with molecular size and polarity increases with molecular size.
6.The following pairs which show dipole-dipole forces are ….
a.Cl2 and HCl
b.HF and H2
c.H2 and H2
d.HF and HF
e.HCl and HBr
7.Hydrogen bonding is an example of a ....
a.weak intermolecular force
b.strong intermolecular force
c.weak covalent force
d.strong ionic force
8.The following substances which displays intramolecular hydrogen bonding is ….
a.CH4
b.CH3OH
c.CH3COOH
d.CH3OCH3
e.CH3CH2CH3
9.The following molecules which shows the greatest effects of intermolecular forces is ….
a.CH4
b.H2S
c.NH3
d.HCl
e.H2O
10. The compound which has the highest boiling point is ....
a.HF
b.HCl
c.HBr
d.HI
e.HAt

CHEMICAL BONDING QUIZ X Part III

1.Which substance contains nonpolar covalent bonds?
a. Cl2
b. Ca(OH)2
c. H2O
d. CaO
e. CCl4
2.Which type of substance is soft, has a low melting point, and is a poor conductor of heat and electricity?
a. network solid
b. metallic solid
c. molecular solid
d. ionic solid
3.Which substance contains coordinate bond?
a. NH4Cl
b. NH3
c. HCl
d. NaCl
e. H2O
4.The correct answer of the dot electrons with an arrow is ….
a. ionic bond
b. covalent bond
c. co-ordinate bond
d. lone pair electrons
e. bond pair electrons
5.Which molecule is nonpolar?
a. HF
b. CO2
c. H2O
d. NH3
e. H2S
6.Which bond has the highest degree of polarity?
a. HF
b. NO
c. H2O
d. H2
e. N2
7.Which of the following molecules is polar?
a. CO2
b. H2
c. H2S
e. BF3
e. CCl4
8.Molecular polarity can be determined by the ….
a. number of protons
b. number of electrons
c. distribution of charge
d. distribution of neutrons
e. number of pair electrons
9.Which characteristic is a property of molecular substances?
a. low boiling point
b. high melting point
c. good heat conductivity
d. good electrical conductivity
10.What is used to assess the degree of polarity in the bond?
a.the sum of electronegativity of the two bonded atoms
b.electronegativity difference of the two bonded atoms
c.the sum of ionization energy of the two bonded atoms
d.atomic radius difference of the two bonded atoms
e. length of radius of the two bonded atoms
11.Which of the following statements is (are) incorrect?
a. Nonmetals tend to react with other nonmetals to form molecular compounds.
b. Symmetrical molecules are nonpolar
c. The distribution of charge is unequal in an asymmetrical molecule.
d. H2 is a symmetrical molecule
e. CH4 is an asymmetrical molecule
12.Metallic bond is the bond occurs between ….
a.substances
b.metal and non metal
c.compounds
d.metal
e.metal in ionic compound
13.The correct statement about metallic bond is the bond between ….
a.cation and anion
b.anions and electrons’ current
c.negative ions of non metals and electrons’ current
d.positive ions of metals and electrons’ current
e.negative ions of metals and electrons’ current
14.Which statement describes a chemical property of iron?
a. Iron conducts electricity and heat
b. Iron can be drawn into a wire
c. Iron can be flattened into sheets
d. Iron combines with oxygen to form rust V
e. Iron can melt at room temperature
15.The effect of electrons’ current in metal is ….
a.electrons have a strong bond
b.protons link each other
c.electrons move freely
d.protons and electrons link strongly
e.electrons interact one of another
16.Metallic bonding occurs between atoms of ….
a. sulfur
b. fluorine
c. copper
d. carbon
e. hydrogen
17.Metallic bonding occurs between metal atoms that have ….
a. full valence orbitals and low ionization energies
b. full valence orbitals and high ionization energies
c. vacant valence orbitals and low ionization energies
d. vacant valence orbitals and high ionization energies
18.Which characteristic is a property of metallic substances?
a. low boiling point
b. low melting point
b. no conductivity because there are no free moving electrons/ions
c. not malleable because particles cannot slide pass one another
d. relatively low solubility
19.Which of the following Period 4 elements has the most metallic characteristics?
a. K
b. Ca
c. As
d. Ge
e. Br
20.Which of the following elements has the most metallic characteristics?
a. Ca
b. O
c. Na
d. Al
e. Br

CHEMICAL BONDING QUIZ X Part II

1. Which substance contains a bond with the greatest ionic character?
a. KCl
b. HCl
c. HF
d. Cl2
e. F2
2. What do ionic solids have between particles?
a. very strong ionic bonds
b. very weak ionic bonds
c. relatively weak ionic bonds
d. relatively strong ionic bonds
3. Which substance conducts electricity when melted but not when solid?
a. a molecular compound
b. an ionic compound
c. a metal
d. a nonmetal
4.An element with an electronegativity of 0.9 bonds with an element with an electronegativity of 3.1. Which phrase best describes the bond between these elements?
a.mostly ionic in character and formed between two nonmetals
b.mostly ionic in character and formed between a metal and a nonmetal
c.mostly covalent in character and formed between two nonmetal
d.mostly covalent in character and formed between a metal and a nonmetal
e.mostly covalent in character and formed between two metals
5. Which compound has the highest melting point?
a. HC1
b. NaCl
c. CO2
d. H2SO4
e. NO2
6.Which is not an identity of the bond formed between 2 hydrogen atoms?
a.non polar bond
b.sharring of electrons
c.single covalent bond
d.double covalent bond
7.One valence electron from each chlorine atoms are transferred.How many valence electrons are shared in a double bond?
a. 2
b. 3
c. 4
d. 6
e. 8
8.A triple bond is formed when ….
a. 1 pair of electrons is shared.
b. 2 pairs of electrons are shared.
c. 3 pairs of electrons are shared.
d. 4 pairs of electrons are shared.
9. In a multiple covalent bond ….
a.only one pair of electrons is shared.
b.more than one pair of electrons is shared between two atoms.
c.more than one pair of electrons is shared between four atoms.
d.more than two pair of electrons is shared between two atoms.
10. HCl is formed ….
a. when 1 pair of valence electrons is shared, one from the hydrogen atom and one from the chlorine atom.
b.when 1 pair of valence electrons is shared, none from the hydrogen atom and two from the chlorine atom.
c.when hydrogen atom give off one valence electron to chlorine atom.
d.when chlorine atom give off one valence electron to hydrogen atom.
11. The electrons in the bond between hydrogen and flourine are more strongly attracted to the atom of ….
a.hydrogen, which has the higher electronegativity
b.fluorine, which has the higher electronegativity
c.hydrogen, which has the lower electronegativity
d.fluorine, which has the lower electronegativity
12. Which compound contains a covalent bond?
a. HCl
b. NaCl
c. KF
d. BaO
e. Li2O
13. When a reaction occurs between atoms with electron configurations of (2,8,5) and (2,7), the bond formed is mainly ….
a. ionic
b. polar covalent
c. metallic
d. coordination
e. nonpolar covalent
14. In which compound do atoms form bonds by sharing electrons?
a. H2O
b. CaO
c. Na2O
d. MgO
e. K2O
15. What is the maximum number of covalent bonds that a carbon atom can form?
a. 1
b. 2
c. 3
d. 4
e. 5
16. Which pair of bonds will share electrons when a bond is formed between them?
a. Ba and I
b. Br and Cl
c. K and Cl
d. Li and I
e. Na and Br
17. Which substance contains nonpolar covalent bonds?
a. H2
b. Ca(OH)2
c. HF
d. H2O
e. CaO
18. Which compound contains both ionic and covalent bonding?
a. MgCl2
b. CO2
c. KNO3
d. KI
e. HclO
19. Silicon dioxide (SiO2) and diamonds are best described as ….
a. molecular substances with coordinate covalent bonding
b. molecular substances with ionic bonding
c. network solids with covalent bonding
d. network solids with ionic bonding

CHEMICAL BONDING QUIZ X Part I

1.lewis structure of an atom shows ....
a.a number of electrons in the inner shells
b.electrons in the outermost shell
c.all electrons in an atom
d.all particles in an atom
e.all negative particles
2.How many dots are to be around Ne in its Lewis structure?
a.1
b.2
c.4
d.6
e.8
3.Which element attains the structure of a noble gas when it becomes a 2+ ion?
a.Li
b.Ba
c.Al
d.Cl
e.Ar
4.Which element attains the structure of a noble gas when it becomes a l+ ion?
a.K
b.Ca
c.Al
d.F
e.Ne
5.How many dots would the electron dot-diagram of Mg2+ have?
a.0
b.2
c.8
d.10
e.12
6.Which of the following atoms has the greatest tendency to attract electrons?
a.calcium
b.carbon
c.boron
d.beryllium
e.bromine
7.The distribution of charge is determined by the use of ….
a.electrons
b.protons
c.electronegativity
d.electropositivity
e.valence shells
8.What do the following have in common? 20Ne 19F- 24Mg2+
a.They are different elements so they have nothing in common
b.They are isotons of each other
c.They are isotopes of each other.
d.They are isoelectronic with each other.
e.They are isomers of each other.
9.When bromine gains one electron it ….
a.becomes a positive ion with a smaller radius
b.becomes a negative ion with a larger radius
c.becomes a positive ion with a larger radius
d.becomes a negative ion with a smaller radius
e.becomes a negative ion with the same radius
10.Which of the following substances does not belong to the major categories of compounds?
a.LiCl
b.Li
c.NO
d.CO
e.HCl
11.In ionic bonds, nonmetals are most likely to ….
a.gain electrons
b.lose electrons
c.share electrons
d.cancel electrons
e.transfer electrons
12.When a potassium atom reacts with bromine, the potassium will ….
a.lose only 1 electron
b.lose 2 electrons
c.gain only 1 electron
d.gain 2 electrons
e.share of pair electrons
13.The negative ion F- has the same electronic configuration as the positive ion ….
a.Ca2+
b.Li+
c.Mg2+
d.K+
e.Ba2+
14.Ionic bonds are formed when ….
a.valence electrons are shared between bonded atoms
b.valence electrons are transferred from one atom to another
c.all the electrons are shared between bonded atoms
d.all the electrons are transferred from one atom to another
15.When a reaction occurs between atoms with ground-state electron configura-tions of (2,1) and (2,7), the bond formed is mainly ….
a.ionic
b.metallic
c.polar covalent
d.nonpolar covalent
e.coordinate covalent
16.Which compound contains ionic bonds?
a.NO
b.CaO
c.HCl
d.CO
e.CCl4
17.Lithium and chloride react to form LiCl, an ionic compound. The chloride ion has ____ electrons in its outermost occupied shell.
a.2
b.6
c.7
d.8
e.18
18.When a sodium atom reacts with a chlorine atom to form a compound, the electron configurations of the ions forming the compound are the same as those in which noble gas atoms?
a.krypton and neon
b.neon and helium
c.krypton and argon
d.neon and argon
e.argon krypton