determine-the-identity-of-an-element-that-has-completely-filled-the-first-second

Question

Determine the identity of an element that has completely filled the first, second, and third shells and has three electrons in the fourth shell. Is it a metal or a nonmetal? In which orbital is the last electron found?

Accepted Answer

The element is gallium which is a metal. Its last electron can be found in the 4p-orbital.

Answer

The element is zinc which is a metal. Its last electron can be found in the 4s-orbital.

Answer

The element is copper which is a metal. Its last electron can be found in the 4s-orbital.

Answer

The element is bromine which is a nonmetal. Its last electron can be found in the 4p-orbital.