Delta h for CuO (s)+NO(g)=Cu2O(s)+NO2(g)

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. : )

The grooves or folds of the brain are called

What is the molar mass of a gas that has density of 2.054 g/l