An atomic cation with a charge of +2 has the following electron configuration: [He] 2s 2 p° What is the chemical symbol for the ion? How many electrons does the ion have? How many 2s electrons are in the ion?

From top to bottom, down the periodic table, ionization energy tends to decrease. This is best explained by: a) the greater distance of the electron from the nucleus.   b) the instability of atoms at the bottom of the periodic table.   c) the greater repulsion between electrons as more are added.   d) the strong pull of the nucleus on outer electrons.

For the successive ionization of an atom of nitrogen, which ionization step would the first large increase in ionization energy comparing to the previous step? Explain

What is the electron arrangement for the element that has two more protons than carbon?