Question

why elements of group 1 and 2 are known as S block element​

Answer 1

Answer:

The first two vertical columns of the Periodic Table, i.e. Groups 1 and 2, are called the s–block metals, because they only have 1 or 2 electrons in their outer shell.

Explanation:

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Answer 2

The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons, two groups (1 & 2) belong to the s-block of the Periodic Table.

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The first two vertical columns of the Periodic Table, i.e. Groups 1 and 2, are called the s–block metals, because they only have 1 or 2 electrons in their outer shell.

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