Question

how the valency of an element can be determined​

Answer 1

The valency of an element :-

The valency of an element can be decided by the number of electrons in thr outermost shell of the atom.(the need tk full fill octet or duplete)

like for example oxygen has, 6 electrons in its outermost shall and it need 2 more to conplete its octet so its valency will be 2.

ans similirly you can calculate.

The one whose octet and duplete are complete have 0 valency.

like noble gases.

ex:- helium etx

Answer 2

Answer:

HERE IS UR ANSWER

Explanation:

VALENCY OF AN ELEMENT CAN BE DETERMINED BY NUMBER OF ELECTRONS PRESENT ON ITS OUTERMOST SHELL.

FOR EXAMPLE:

MAGNESIUM HAS ATOMIC NUMBER OF 12

ITS ELECTRONIC CONFIGURATION IS

2,8,2

HENCE VALENCY OF MAGNESIUM IS 2

HOPE IT HELPS U......