O2- stands for superoxide anion, S2- stands for sulfide anion, H- stands for hydrogen anion, and Na+ stands for sodium this all ions possess the electron configuration of noble gas because each of them (O2-, S2-, H-, and Na+) has a full outer shell.
Answer:
13
Explanation:
atomic molar mass of 27 grams per mole. Al has 13 protons (hence number 13) and it most common ...
A. Boiling water is an example of physical change, whereas digesting food, breaking glass, and shoveling snow are not.