Question

If an element X has its valency equal to 3 what will be the formula of its

carbonate ion.​

Answer 1

Explanation:

The formula would be X₂(CO₃)₃. Oxygen is usually divalent also, so the oxide formula would be X₂O₃. X forms 3+ ion and since carbonate and oxygen are both 2- they would form similar formulas.

Answer 2

The formula of the carbonate ion will be$X_{2}(CO_{3} )_{3}$.

• The valency of an element is defined as the combining capacity of the particular ion. The valency of a number can be positive, negative, or zero.
• As the given element X is trivalent, The ion will be$X^{+3}$.
• The carbonate ion is formulated as$CO_{3}^{-2}$.
• The formula of the chemical compound formed by the anion and the cation can be found using the Criss-Cross method.
• The Criss-Cross method is used to formulate a chemical compound where the ions are interchanged such that they become sub-script of each other.

=>$X^{+3}$ and$CO_{3}^{-2}$, ( Exchange the ions as sub-script to each other ).

=>Chemical Formula =$X_{2} (CO_{3}) _{3}$.

Therefore, the chemical formula of the compound is$X_{2} (CO_{3}) _{3}$.