I need help with these chemistry questions please help!?

Question

1. What element is present in ions having both the -ate and -ite suffixes?

2.What is the difference between NO2 with a negative charge above it and NO2 with no charge above it.

3. Which ion is shown first when writing the formula of an ionic compound?

Answer 1

1) oxygen
2) NO2 1- is nitrite = polyatomic ion while NO2 is nitrogen dioxide = a compound with no net charge
3) Cations (positive ions, metallic ions) are always first.