What is the chemical formula and name when the following are added:

1. Na+1 Na-3

2. Na+1 Br-1

3. Na+1 O-2

I think the formulas are

Na3Na

NaBr

Na2O

How do I get the names?

Again, the first one is nonsense.

on the second Sodium bromide
on the last sodium oxide

To determine the chemical formula and name when different ions are added, we need to consider the charges of the ions involved. The overall chemical formula and name can be determined by balancing the charges of the ions.

1. Na+1 + Na-3:
Since sodium (Na) has a +1 charge and sodium (Na) also has a -3 charge, we need to find a common multiple for these charges. The least common multiple of 1 and 3 is 3. To balance out the 1+ charge and the -3 charge, we need three sodium ions. Therefore, the chemical formula is Na₃, and the name of the compound is sodium.

2. Na+1 + Br-1:
Here, sodium (Na) has a +1 charge, and bromine (Br) has a -1 charge. Since the charges are already balanced (1+ and 1-), we don't need to adjust the numbers of ions. The chemical formula is NaBr, and the name of the compound is sodium bromide.

3. Na+1 + O-2:
In this case, sodium (Na) has a +1 charge, and oxygen (O) has a -2 charge. To balance out these charges, we need two sodium ions for each oxygen ion. The chemical formula is Na₂O, and the name of the compound is sodium oxide.

Remember to always balance the charges of the ions to get the correct chemical formula and name when different ions are added together.