Question

Give the uncondensed ground state electron configurations for the following atoms and ions.

a. Te2-

b. As

c. Cr

d. The smallest halogen atom

e. Al3+

Answer 1

a) Te^-2

atomic number of Te = 52

electron configurations for Te^-2 = 1s²2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶

b) As

atomic number of As = 33

electron configurations for As = 1s²2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4s² 4p³

c) Cr

atomic number of Cr = 24

electron configurations for Cr = 1s²2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵

d) the smallest halogen is F.

atomic number of F = 9

electron configurations for Cr = 1s²2s² 2p⁵

e) Al+3

atomic number of Al = 13

electron configurations for Al⁺³= 1s²2s² 2p⁶