Ionic Compounds. Chemistry question?

Question

I need some help with the following 2 questions. I do not understand how to get the answers or what the answers are:

1. Write the formulas for the following compounds:

a) sodium iodide

b) berylium fluoride

c) magnesium oxide

d) aluminum sulfide

e) copper(I) bromide

f) iron(II) sulfide

2. Write the names for the following compounds:

a) KCl

b) Na3P

c) CaF2

d) SnCI2

e) SnCI4

Please explain how to get the answer so i can understand how to complete these questions in the future.

Answer 1

First group. positive charge must match negative. ( these all look ionic )

1)

a) NaI

b) BeF2

c) MgO

d) Al2S3

e) CuBr

f) FeS

Second group seem to follow ionic naming rules.

2)

a) Potassium chloride

b) Sodium phosphate

c) Calcium fluoride

d) Tin(II) Chloride

e) Tin(IV) Chloride

The first group is all ionic compounds, where you match charges. Use 1d as an example. Al(3+) in charge and S(2-) in charge. You see that Al and S do not match, so I needed to put 2Al into the compound to match 3S (6+ to 6-)

The second group you can see from the first. Use the leading compound name and add -ide to the non-metal. The transition metals have their variable charges in Roman numerals, enclosed in parenthesis.