Which element from group 2a will form an ion that will have 36 electrons?

What is the lowest number energy level where a d sublevel is found

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.

Can someone me out on this question for my national 5 chemistry homework