Organic Chemistry 9th Edition

Published by Brooks Cole
ISBN 10: 1305080483
ISBN 13: 978-1-30508-048-5

Chapter 1 - Structure and Bonding - Problem: 2

Answer

$a)$ $Magnesium:$ Has 2 electrons on its outermost shell $a)$ $Cobalt:$ Has 2 electrons in its outermost shell $a)$ $Selenium$: Has 6 electrons on its outermost shell

Work Step by Step

$a)$ Magnesium would have two electron on its outermost shell and because it is coming from group 2 and has its electron configuration (1s² 2s²2p⁶ 3s²) ending with 2 electrons on 3s $b)$ Cobalt would have two electrons on its outermost shell because has its electron configuration chain ( $1s^{2}2s^{2}2p^{6}3s^{2}3d^{7}4s^{2}$) ending with 2 electrons on 4s $c)$ Selenium would have six electron on its outermost shell and because it is coming from group 6 and has its electron configuration ( $1s^{2}2s^{2}2p^{6}3s^{2}3d^{10}4s^{2}4p^{4}$ ) ending with 2 electrons on 4s and 4 electrons on 4p
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