Question

among Li+,k+,cs+,Na+ electronic configuration 1s2,2s2,2p6,3s2,3p6 corresponds to​

Answer 1

Answer:

Explanation:

As all are cations this means they have lost 1 electron k has 19 electrons but it is k+ now therefore it means it has now 18 electrons. Which shows this electronic configuration belongs to k+.

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Answer 2

Answer:

K+

Explanation:

K has a configuration of

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

After losing 1 electron , the configuration becomes :

${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{2} {3p}^{6}$

which is the required configuration..

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