Question

magnesium (mg): 1s²2s²2p⁶3s²
core electrons
valence electrons

Explanation:

Core electrons are the electrons in an atom that are not valence electrons. Valence electrons are the electrons in the outermost shell of an atom. In the electron configuration of magnesium (\(1s^{2}2s^{2}2p^{6}3s^{2}\)), the \(1s^{2}2s^{2}2p^{6}\) electrons are core electrons (they are in the inner shells), and the \(3s^{2}\) electrons are valence electrons (they are in the outermost shell).

Answer:

core electrons: \(1s^{2}2s^{2}2p^{6}\), valence electrons: \(3s^{2}\)