What increases in equal steps of one from left to right in the periodic table for the…

CHEMISTRY · Single correct · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends

Problem

What increases in equal steps of one from left to right in the periodic table for the elements sodium to argon? (1) The relative atomic mass (2) The number of occupied electron energy levels (3) The number of neutrons in the most common isotope (4) The number of electrons in the atom

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