Show the path to the formation of sodium calcium and aluminum bases please help me​

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 carbon dioxide will form if 2.5 moles of c3h8 is burned

Stage in which a star’s outer layers have started to cool and grow outward?