Name______________________________________ Date____________ Block____
ChemThink: Molecular Shapes
Question/Statement
Answers
1. VSEPR theory allows us to
predict the ______ the covalently
bonded molecules have.
2. Areas of a molecule that have a
higher concentration of
a)_____ will b)______ each other,
and these repulsions affect the
shape of the molecule.
3. A covalent bond is actually
electrons that are being ___ by
two atoms.
4. When 3 atoms bond, the
negatively charged electrons in
each ___will repel each other.
5. When three atoms are bonded
to a central atom, how far apart
are the atoms from each other?
6. When four atoms are bonded
to a central atom, how far apart
are the atoms from each other?
7. Draw the Lewis structure for
the CO2 molecule.
1.
8. How many areas of
concentration are there around
the central atom of the CO2
molecule?
9. How many lone pairs of
electrons in CO2?
10. How will the areas of
concentration arrange themselves
to be as far apart as possible in
the CO2 molecule?
11. Draw the Lewis structure for
the NO3− polyatomic ion.
8.
2.
a)
b)
3.
4.
5.
6.
CO2Predicted (before doing
chemthink)
9.
10.
11.
Did you get it right? (Yes/No)
If no, draw CO2 correctly.
12. For the nitrate ion, how many
areas of electron concentration
are there around the central
atom?
13. How many lone pairs of
electrons are in NO3-?
14. How far apart will the atoms
in the NO3− ion be?
15. Draw & Name the shape of
the NO3− ion.
16. Draw the Lewis structure for
SO2
12.
13.
14.
15.
SO2Predicted (before doing
chemthink)
Did you get it right? (Yes/No)
If no, draw SO2 correctly.
17. How many lone pairs of
17.
electrons are in the SO2 molecule?
18. The lone pair of electron ___ 18. does or does not
affects the shape of the molecule.
If yes, how.
19.Draw and name the shape of
19.
the SO2 molecule.
20.Draw the Lewis structure for
CH4
CH4Predicted (before doing
chemthink)
Did you get it right? (Yes/No)
If no, draw CH4 correctly.
21. How many areas of electron
concentration are around the
carbon atom in the CH4 molecule?
22. How many lone pairs of
electrons are in the CH4 molecule?
23. How far apart are the four
hydrogen atoms in the CH4
molecule?
24. Draw and name the shape of
the CH4 molecule.
21.
25. Draw the Lewis structure for
NH3
NH3Predicted (before doing
chemthink)
26. How many areas of electron
concentration are around the
carbon atom in the NH3 molecule?
27. How many lone pairs of
electrons are in the NH3
molecule?
28. The lone pair of electron ___
affects the shape of the molecule.
If yes, how.
29. Draw and name the shape of
the NH3 molecule.
26.
22.
23.
24.
27.
28. does or does not
29.
Did you get it right? (Yes/No)
If no, draw NH3 correctly.
30. Draw the Lewis structure for
H2O
H2O Predicted (before doing
chemthink)
31. How many areas of electron
concentration are around the
carbon atom in the H2O molecule?
32. How many lone pairs of
electrons are in the H2O
molecule?
33. The lone pair of electron ___
affects the shape of the molecule.
If yes, how.
34. Draw and name the shape of
the H2O molecule.
31.
32.
33. does or does not
34.
Did you get it right? (Yes/No)
If no, draw H2O correctly.