An atom has a valence shell electron configuration of $n s^{1}$ $ns^1$ . To which group of elements in the periodic table does it belong?

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An atom has a valence shell electron configuration of $n s^{1}$ $ns^1$ . To which group of elements in the periodic table does it belong?

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Answer 1 · 2016-05-03T13:55:43

Group 1.

Explanation:

In an electron configuration under the general form of $n s^{1}$ $ns^1$ , the $n$ $n$ represents the period number and the $1$ $1$ represents the group number, and therefore, the element would be in group 1.

Example,
$_{1} H : 1 s^{1}$ $""_1H:1s^1$

$_{3} L i : 1 s^{2} 2 s^{1}$ $""_3Li:1s^(2)2s^(1)$

$_{11} N a : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ $""_11Na:1s^(2)2s^(2)2p^(6)3s^(1)$

Hydrogen, Lithium and sodium electron configuration end with $1 s^{1}$ $1s^1$ , $2 s^{1}$ $2s^1$ and $3 s^{1}$ $3s^1$ respectively. They are all group 1 elements however, the period number is different; 1, 2 and 3 respectively.

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An atom has a valence shell electron configuration of $n s^{1}$ $ns^1$ . To which group of elements in the periodic table does it belong?

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An atom has a valence shell electron configuration of ns^1ns1ns^1. To which group of elements in the periodic table does it belong?

1 Answer

Explanation:

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An atom has a valence shell electron configuration of $n s^{1}$ $ns^1$ . To which group of elements in the periodic table does it belong?