Please help if you can. thank you.

Explanation:

Hey, just for a quick tip..you can use a cross to determine which ion will have how many atoms. check the image attached.

explanation:

crosscutting concepts have application across all domains of science. as such, they are a way of linking the different domains of science. they include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.