How many atoms are in 4Ca3(PO4)2

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. : )

What is the value of keq for the reaction expressed in scientific notation

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution