Question

Which of the following matches the electronic configuration of noble element?

• A. ${\mathrm{O}}^{-}$
• B. ${\mathrm{O}}^{2+}$
• C. ${\mathrm{N}}^{3-}$
• D. ${\mathrm{Mg}}^{+}$

Answer 1

The correct option is C

${\mathrm{N}}^{3-}$

Nitrogen by gaining 3 electrons attain noble gas configuration. Electronic configuration of Nitride(${\mathrm{N}}^{3-}$) ion= 2,7+3=10 electrons (Neon configuration)

Conclusion: Therefore (${\mathrm{N}}^{3-}$^-) has noble electronic configuration. Hence option C is correct here.