Chemical formula

Select whether the following statement is true or false:

The chemical formula of the anion present in sodium bicarbonate is ${{\mathrm{HCO}}_3}^{-}$ .

The chemical formula of the cation present in sodium dichromate is _____.

Select whether the following statement is true or false:

${\mathrm{Na}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ is the formula for sodium dichromate. 

Select the chemical formula of sodium dichromate.

The chemical formula of the anion present in sodium dichromate is _____.

$\mathrm{A}. \mathrm{Cr}{{\mathrm{O}}_4}^{2-}$

$\mathrm{B}. {\mathrm{Cr}}_2{{\mathrm{O}}_7}^{2-}$

$\mathrm{C}. {\mathrm{MnO}}_4^{-}$

(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

The chemical formula of the cation present in sodium bicarbonate is _____.

Select the chemical formula of sodium bicarbonate.

Write down the chemical formula for the following compounds.

sodium chloride and calcium oxide.

An element 'A' has valency 1 and an element 'B' has valency 2. Write the formula of the compound formed by 'A' and 'B.'

The symbol of the element cobalt is _____.

The symbol of tin is _____.

The symbol of silver is _____.

The full form of  IUPAC is _____ (International Union of Pure and Applied Chemistry/ International Union of Pure and Alternative Chemistry).

The chemical formula of aluminium chloride is _____.

The chemical formula of Calcium oxide is _____.

The chemical formula of copper nitrate is _____.

The chemical formula of Lead nitrate is _____.

The chemical formula of magnesium chloride is _____.

_____ of a compound is a symbolic representation of its composition.

_____ of a compound is a symbolic representation of its composition.