Question

how does valiency change when we move down a group ?, give one example
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Answer 1

Answer:

QUESTION. ⬇️

how does valiency change when we move down a group ?, give one example

ANSWER.⬇️

There are seven periodic numbered as 1, 2, 3, 4, 5, 6 and 7.

Each period consists of a series of elements having same valence shell.

Each period corresponds to a number of shells.

Groups :

There are eighteen groups numbered as 1, 2, 3, 4, 5, ........... 13, 14, 15, 16, 17, 18.

Group consists of a series of elements having similar valence shell electronic configuration.

Across a period the valence electrons increases, while down a group they remain same.