Question

an element X has valency 3 what will be the formula with carbonate ion​

Answer 1

Explanation:

Charge on carbonate ion is - 2 and on oxide is also - 2.

So formula of the carbonate will be X2(CO3)3

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Answer 2

An element X has valency 3, and the formula with carbonate ion​ is $X_{2} (CO_{3})_{3}$.

Valency of an element:

• In chemistry, valence, sometimes called valency, is a characteristic of an element that establishes how many other atoms of the element each atom can interact with.
• The phrase, which was first used in 1868, is used to represent both the broad capability of a combination of an element and its numerical value.
• The valence or valency of an element in chemistry is a measurement of how well it can combine with other atoms to form chemical compounds or molecules.

How to write a chemical formula?

• Suppose X has a valency of 3.
• So X can be written as $X^{+3}$.
• And the carbonate ion is written as $CO_{3} ^{-2}$
• So now we have to exchange their valency with each other.
• And hence the chemical formula becomes $X_{2} (CO_{3})_{3}$.

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