Which term identifies a form of energy ? 1- combustion 2-exothermic 3-thermal 4-electrolytic

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?