Question

Stannic ion takes up _____ electrons to convert to stannous ion.

Answer 1

Electronic configuration of Sn with atomic number 50

$\left[\mathrm{Kr}\right]4{\mathrm{d}}^{10}5{\mathrm{s}}^{2}5{\mathrm{p}}^2$

Electronic configuration of stannous ion ${\mathrm{Sn}}^{+2}$is:

• A stannous ion is formed by giving two electrons, two electrons are gone from the 5p

$\left[\mathrm{Kr}\right]4{\mathrm{d}}^{10}5{\mathrm{s}}^{2}5{\mathrm{p}}^0$

Electronic configuration of stannic ion ${\mathrm{Sn}}^{+4}$is:

• A stannic ion is formed by giving 4 electrons. 2 electrons from 5p and 2 from 5s

$\left[\mathrm{Kr}\right]4{\mathrm{d}}^{10}5{\mathrm{s}}^{0}5{\mathrm{p}}^0$

• A stannous ion is formed by taking up 2 electrons from a stannic ion

${\mathrm{Sn}}^{+4}+2{\mathrm{e}}^{-}\to {\mathrm{Sn}}^{+2}$

Conclusion: Stannic ion takes up 2 electrons to convert to stannous ion