Selenium has atomic number 34

CHEMISTRY · Single correct · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

Selenium has atomic number 34. Which noble-gas electron configuration represents selenium in its ground state? (a)

[Ar]\,4s^2\,3d^{10}\,4p^{6}

(b)

[Ar]\,4s^2\,4p^4

(c)

[Ar]\,4s^2\,3d^{10}\,4p^4

(d)

[Ar]\,4s^2\,3d^{10}\,4p^2

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