Question

What is valency? Explain in detail​

Answer 1

Answer:

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

The noble gases have the valency 0 as they do not usually combine with other elements.

To write the chemical formula for a compound it is best to use the S.V.S.D.F system.

S - write down the symbols of both the elements involved.

V - beneath each symbol, write it’s valency. Memorising the above table is useful.

S - swap the valencies over.

D - if the valencies can be simplified, divide them both by the smaller of the two numbers. If one of the numbers is already one, then they cannot be divided and simplified any further.

F - write the formula.

Hope it helps u

Answer 2

Answer:

Valency is the combining capacity of an element.

Explanation:

That means to attain octet an atom either gives elections or accept elections.

for example sodium has valency one it's configuration is 1s2,2s2,2p6,3s1....it should give 3s1 election to attain octet

similarly if you take any element you will have the valency

note: if the the last shell has numbers between 5-8 then you have to subtract the numbers from 8 the resultant number is the valency take chlorine as example

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