1) Name at least three atoms or ion has the same electron configuration as a phosphide ion?

2) Name at least three atoms or ions that have the same electron configuration as a neon atom?

3) Name at least two electron configurations in the excited state for an atom of aluminum?

4) Name at least two electron configurations in the excited state for an atom of sodium?

5) Convert the following excited state electron configurations into ground state configurations:

a) 2-8-18-16-5

b) 2-8-16-8-4

c) 2-8-18-5-2

6) Give an appropriate number of electrons in each shell to represent a magnesium atom in an excited state. You may include additional shells

7) Name at least three elements that have a partially filled second shell in the ground state?