If an element has a charge of 3+, how many more protons does it have than electrons?

It would have 3 more protons because protons have a positive charge and electrons have a negative charge. To balance them out you would have to have the same amount of protons and electrons so the charge can be neutral. However, in this case, there is a positive charge of 3. so long story short the answer would again be 3 .

the answer is na (sodium)

fe 55.85 g/mol and h2o 18.02 g/mol.