How many moles are equal to 1.20 x 10^24 atoms of sulfur?

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. : )

Which fact represents evidence for the big bang theory?

The biosphere of the earth is made up of what compound? organic or inorganic?