Chemistry, asked by aaronalex, 7 months ago

answer pls............​

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Answered by raznashah
1
It’s not clear ......
Answered by aaryanmahajan1001
1
K Shell has : 2 electrons
L Shell has : 8 electrons
M Shell has : 3 electrons

a )Electronic Configuration : 2 , 8 , 3

Total no : of electrons = 2 + 8 + 3 = 13
No : of electrons = No : of protons = 13

No : of protons = atomic no: of that element

Atomic no: of the element = 13

b)Valency is the combining capacity of an element.Since , this element has 3 electrons in its valence shell , the Valency of the element is 3.

c)The element is Aluminium.It is a metal.

The elements with valency less than 5 are metallic in nature.
The elements with valency more than or equal to 5 are non metals.
Elements which has fully filled shells are called noble gas / inert gas.

Thus , Aluminium is metallic in nature.

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