Question

element A has valency 4 and element B has valency 3 find the formula
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Answer 1

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Answer 2

Given:

Element A has valency 4 and element B has valency 3.

To find:

Formula of the compound formed by A and B.

Solution:

We shall use criss-cross method to calculate the molecular formula of the compound formed by A and B.

$A(4) \: \: \: \: \: B(3)$

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$\rightarrow \: A_{3}B_{4}$

Steps followed in this method:

• First write the atoms with corresponding valencies in bracket.

• Then criss-cross the valencies to the opposite atom using arrows.

• Then write the required formula in its simplest whole number form.

Hope It Helps.