Question

formula and valency of aluminium

Answer 1

Formula of Aluminum is Al

Valency of Aluminum is 3

It's configuration is:-
2,8,3

it donates 3 electrons to get the nearest inert gas configuration, i.e., neon.

No. of protons =13

No. of electrons =13

Atomic mass=27

No. of neutrons =14

Answer 2

HI there !!!

Aluminium : -

Chemical formula : Al

Atomic number = 13

No: of protons = 13

No: of electrons = 13

Electronic configuration = 2 , 8 , 3

Valency = No: of electrons in the valence shell = 3
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Hope this helps you !!!