Good grief, you should be able to figure these out. Most of them are ionic bonds with easily looked up electron configurations and resulting valences.
Try Googling Cesium Bromide for example:
https://en.wikipedia.org/wiki/Caesium_bromide
Write the formula for each of the following compounds:
a. cesium bromide
b. barium sulfate
c. ammonium chloride
d. chlorine monoxide
e. silicon tetrachloride
f. chlorine trifluoride
g. beryllium oxide
h. magnesium fluoride
3 answers
The thing is I really want to understand them without google?..Because I won't have google during my exam..Thanks anyways..
Memorize the valence of each of those elements. It wont be difficult.