Which of the following is the correct ground-state electron configuration

CHEMISTRY · Single correct · A Level · Chemistry · Atomic structure · Atomic structure

Problem

Which of the following is the correct ground-state electron configuration, in noble-gas notation, for silver (atomic number 47)? (a)

[\text{Kr}]4d^{9}\,5s^{2}

(b)

[\text{Kr}]4d^{10}\,5p^{1}

(c)

[\text{Kr}]4d^{10}\,5s^{1}

(d)

[\text{Kr}]4d^{10}\,5s^{2}