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What is the formula for this compound?
2 atoms of aluminum, 3 atoms of sulfur

What Is The Formula For This Compound 2 Atoms Of Aluminum 3 Atoms Of Sulfur class=

Answer :

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Answer:

A

Explanation:

2 atoms of aluminum, 3 atoms of sulfur

Aluminum = Al

Sulfer = S

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The formula for 2 atoms of Al and 3 atoms of S is Al₂S₃  and is named  Aluminium Sulphide.

How are the formulas of the compound formed?

Al has atomic no. =13, S has atomic no.=16

So the valencies of the given elements are

Al⁺³ and S⁻² to attain the noble gas configuration.

Al⁺³↘ ↙S⁻³

                  Al₂S₃

Cross multiply the valancies for the formation of molecular formula.

Hence, the formula is Al₂S₃.

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