POLAR MOLECULES TASK

NF3 is a polar molecule. In your paragraphs, explain polarity of molecule, dipole moment, symmetrical or unsymmetrical, and the shape of molecules.
Write the paragraphs about 200 words. Compare this molecule with the non polar molecules which you have learned before.
Conclude the polarity of molecules.Finally, apply your concept to other example, such as H2O, H2S, NH3, and PCl3.

NON POLAR MOLECULES

Have you finished your task on BeCl2 molecules? Its OK, do that task first, before moving the next task.
When you finish explaining BeCl2 molecule and you realise that molecule is non polar, so how about CH4 and BF3? Are they non polar molecules too? Very good, well done.
Here, the picture of BF3 molecule. What the reason is? There are 3 bonding pairs and no lone pair, so it is a symmetrical molecule, the dipole moment of it is zero. No dipole at all.
Yes, good point. How about CH4 molecule? Why this molecule is also a non polar molecule? As same as BeCl2 and BF3 molecules, there is no lone pair electron, it has 4 bonding pairs, so this is a symmetrical molecule too.
Please read your paragraphs, is there any explanation about dipole moment or symmetrical molecules in your task? OK, you can add some points from this discussion to complete it. After that you can go on to the next task, that is a polar molecule.

POLARITY OF MOLECULE TASK

This molecule is BeCl2. Explain why BeCl2 linier. Use the information about atomic number, electronic configuration, valence electron, polarity of covalent bonding, number of electron pairs, number of bonding pairs and number of lone pairs.
Before writing paragraphs, think about the molecules of H2, Cl2, O2, and N2 are non polar molecules. On the other hand, HCl and H2O molecules are polar.
Write 200 words, start with H2 etc. as elements, then move on BeCl2. All explanation about non polar molecules. You can find another compound as example, perhaps CH4 or BF3.