Question

Define valency by taking the example of sillicom and oxygen.

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Answer 1

heya........



#Valency-Number of protons present in the outermost shell of an atom is known as Valency or The combining power of a element with a atom is also known as Valency.

#Taking oxygen as Example-
1.Atomic number of Oxygen is8.2.Electronic configuration-K=2,L=6.3.According to the electronic configuration the valency is 6 but it is easy for oxygen to gain 2 protons instead of loosing 6 protons.So, The valency of oxygen is 2.

#Taking silicon as example-
1.Atomic number of silicon is 14.2.Electronic configuration-K=2,L=8,m=4.3.According to the electronic configuration the valency is +4 or -4 because silicon can either gain 4 electrons or loose 4 electrons because it is a noble gase.


tysm.@kundan

Answer 2

Hey dear !!

So here's your answer :-

Valency of an element is the combining capacity of the element and is equal to the number is electrons that take part in a chemical reaction .

The electronic configuration is silicon is K- 2, L - 8, M -4.

Since it has 4 electrons in its Valence shell, therefore :-

Valency of silicon = 8- number of Valence electrons .
= 8-4 = 4.

The electronic configuration of oxygen is K- 2, L - 6.

Since it had 6 electrons in its Valence shell.

therefore,
valency of oxygen = 8 - Number of Valence electrons.


= 8-6 =2.

Hope this helps you dear ✌✌✌✌