Question

in the ground state, each atom of an element has two valence electrons. this element has a lower first ionization energy than calcium. where is this element located on the periodic table?

Answer 1

Answer:

the element must be in the fifth, sixth, or seventh energy shells.

Explanation:

Because the first ionization energy is less than calcium's, the element must be larger and in the next energy shell. Calcium is in the fourth energy shell, so the element must be in the fifth, sixth, or seventh energy shells.