The History and Arrangement of the Periodic Table Answers

Potassium (K): 1s22s22p63s23p64s1

Iron (Fe): [Ar]4s23d6

Argon (Ar): [Ne]3s23p6

Magnesium (Mg): 1s22s22p63s2

Longhand notation:

Noble-gas notation:

Potassium (K): 1s22s22p63s23p64s1 core electrons

valence electrons

Iron (Fe): [Ar]4s23d6 core electrons

valence electrons

Argon (Ar): [Ne]3s23p6 core electrons

valence electrons

Magnesium (Mg): 1s22s22p63s2 core electrons

valence electrons

Use the periodic to write the electron configuration for rubidium (Rb) in noble-gas notation..Rb: [Kr]s

Use the periodic table to write the electron configuration for barium (Ba) in noble-gas notation.Ba: 6s²

Al:

As:

Zn:

Tc: