Question

Question #39895

Answer 1

Scandium, or `"Sc"`, is located in group 3, period 4 of the periodic table and has an atomic number equal to 21.

This means that the electron configuration for a neutral `"Sc"` atom must account for 21 electrons.

`"Sc": 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(1)`

SInce argon is the last noble gas that comes scandium in the periodic table, the noble gas shorthand notation, the electron configuration for `"Sc"` will be

`"Sc": ["Ar"] 4s^(2) 3d^(1)`