Question

Write the electronic configuration in terms of subshells for the following atoms:
i) Boron
ii) Magnesium
iii) Iron
iv) Bromine
v) Copper



Isotope Abundance
(%)
54Fe 5.8
56Fe 91.7
57Fe 2.2
58Fe 0.3

Answer 1

Electronic configuration :

i) Boron(5) =$1s^2 \ 2s^2\ 2p^1$

ii) Magnesium(12) = $1s^2 \ 2s^2\ 2p^6\ 3s^2$

iii) Iron(26) = $1s^2 \ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 3d^6\ 4s^2$

iv) Bromine(35) = $1s^2 \ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 3d^{10}\ 4s^2\ 4p^5$

v) Copper(29) = $1s^2 \ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 3d^{10}\ 4s^1$