1. ## chemisty work

1. Write a formula for the compound that forms from each pair.

a) Aluminum and sulfur

Aluminum = Al3+ Sulfur= S2-
=Al2S3

b) Beryllium and iodine
Beryllium = Be2+ Iodine= I-
=BeI2
c) Calcium and phosphate

Calcium= Ca2 ???????????

d) Sodium and Oxalate.

I am having a hard time figuring out how to get phosphate and oxalate because they are not on the chart

2. ## Re: chemisty work

Phosphate is PO(4) (3-) charge, and Oxalate is C(2)O(4) (2-). I assume you mean they are not on the periodic table - this is true because they are not elements, but are polyatomic ions.