What is the equation for the formation reaction for gaseous hydrazine, n2h4, at 25ºc and 1 atm pressure?

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. : )

50 pts plz what is the physical state of matter of baking soda.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?