CE Chemistry Formulas
NAME _________________________________ PER _____
Describe in your own words the following:
1. Isoelectronic atoms & ions.
2. Octet Rule
3. Crystal lattice
4. Lattice Sites
Draw the Lewis Structure & write the electron configuration for each of the following:
5. Element 9
6. Magnesium
7. Krypton
Fill in the table below. Write the symbol for each ion, then put the ions together to write the
formula. Remember to make sure the net ionic charge is zero. Calculate the formula weight.
Formula
#
Positive Ion
Ion
Negative Ion
Ion
Formula
Weight
8.
Potassium
Sulfate
9.
Aluminum
Oxide
10. Beryllium
Hydroxide
11. Tin (IV)
Chloride
12. Iron (III)
Hydroxide
13. Ammonium
Fluoride
14. Magnesium
Phosphate
15. Copper (II)
Nitrate
16.
Chromium (III)
Phosphide
17. Strontium
Hydrogen carbonate
18. Manganese (II)
Carbonate
Name the following compounds
#
Formula
19.
Na2O
20.
K3PO3
21.
Ca(OH)2
22.
Mg(NO2)2
Chemical Name (IUPAC)
23.
Fe(OH)3
24.
PbO
25.
PbO2
26.
KMnO4
27.
28.
NaHCO3
CaCrO4
29.
Al2(Cr2O7)3
Lewis Structures
Total #
of
valence
e32
CF4
33
BF3
34
NF3
35
H2CS
36
PO33-
37
CH2F2
38
NO3-
39
O2
40
H2S
Shape Name
Lewis Structure
# atoms
bonded to
central
atom
# of Lone
Pairs on
central
atom
# of eregions
around
central
atom
Polar or
nonpolar