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How does valency of an element …

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How does valency of an element vary across a period ?

Posted by S M Patel 5 years, 10 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 10 months ago

The valency of an element is dependent on the number of electrons in the outermost shell of the electron.

In a group all constituting elements will have the same valency because they all have the same number of electrons in the outer shells.

Across the a period, the number however increase by 1. Therefore in group 1 is valency of 1, in two valency of 2, in three valency of 3..and so on.

Diksha ? 5 years, 10 months ago

Valency first increases then decreases across a period

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