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WAEC Chemistry 2018 Paper

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Question : 44

Total: 50

Which of the following electron configurations represents the transition element Chromium

_{24}Cr

?

$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{4}$
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{6}$
$1s^{2}2s^{2}2p^{6}3s^{2}3d^{4} 4s^{1}$
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{5}$

Solution:

Electronic configuration of Chromium: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{5}$

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