An electron in a sodium atom moves from the third shell to the fourth shell. this change is a result of the atom
(1) absorbing energy (3) gaining an electron
(2) releasing energy (4) losing an electron

The answer is (1) absorbing energy. The electrons just change the shell position. So there is no losing or gaining. And the outer shell has higher energy than inner shell. So the atom is absorbing energy.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.