An atom has a valence shell electron configuration of ns1. to which group of elements in the periodic table does it belong?

1

Explanation:

To get the appropriate group an element belongs to on the periodic table, it is very essential to get the configuration of the valence shell. Hence, by knowing the number of electrons in the valence shell and the electronic configuration of this valence shell, we can know the group it belongs to.

Firstly, to know the group, we need an information on the block to which the element belongs. There are four blocks on the periodic table, the s, p, d and f block.

The letter of the associated with the valence electron configuration would determine the block it belongs. Different blocks have different ways of knowing their electronic configuration. In this example, we are particular about the s block.

For the s block, the group an element belongs to correspond to the number of electrons in that particular s sub-orbital. It must be interesting to note that there could however be only 2 groups in which an element can belong to on the s block. These are the groups 1 and 2.

Thus, once your valence shell electronic configuration is s, you either belong to group 1 or 2. It is now the number of electrons present on the s orbital at that particular point in time that will dictate if the element is in group one or two.

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