Consider the following electron configurations to answer the question. (i) 1s22s22p63s23p64s23d104p65s1 (ii) 1s22s22p63s23p5 (iii) 1s22s22p63s23p64s23d8 (iv) 1s22s22p63s23p64s23d104p6 (v) 1s22s22p43s1 Which ground state electron configuration has the smallest number of valence electrons?

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Multiple Choice

Consider the following electron configurations to answer the question.
(i)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹

(ii)   1s²2s²2p⁶3s²3p⁵

(iii)   1s²2s²2p⁶3s²3p⁶4s²3d⁸

(iv)   1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

(v)   1s²2s²2p⁴3s¹

Which ground state electron configuration has the smallest number of valence electrons?

(i)

(ii)

(iii)

(iv)

(v)

Master The Electron Configuration: Quantum Numbers with a bite sized video explanation from Jules Bruno

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