Chemical Formula

Write down the formula for iron(II) carbonate.

Write down the formula for Aluminium sulphate.

Name the following compounds.

$\mathrm{Cu}{\left(\mathrm{OH}\right)}_2,\mathrm{FeS},{\mathrm{Mg}}_3{\left({\mathrm{PO}}_4\right)}_2,{\mathrm{AgNO}}_3,{\mathrm{PbCO}}_3,{\mathrm{HgBr}}_2$

How many atoms are present in a ${\left({\mathrm{CO}}_3\right)}^{2-}$ion?

How many atoms are present in ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$molecule?

Write down the formula of Calcium hydroxide.

Write down the formula of Zinc sulphide.

Write down the formula of Aluminium nitrate.

If the aluminium salt of an anion X is ${\mathrm{Al}}_2{\mathrm{X}}_3$, what is the valency of X? What will be the formula of the magnesium salt of X?

An element B shows valencies 2 and 3. Write the formula of its two oxides.

If the valency of carbon is 4 and that of sulphur is 2, work out the formula of the compound of carbon and sulphur. Name the compound.

Name the following compounds. Also, write the symbols/formulas of the ions present in them.

${\mathrm{CaCl}}_2$

Name the following compounds. Also, write the symbols/formulas of the ions present in them.

${\mathrm{Na}}_2{\mathrm{CO}}_3$

Name the following compounds. Also, write the symbols/formulas of the ions present in them.

Name the following compounds. Also, write the symbols/formulas of the ions present in them.

${\mathrm{Na}}_2{\mathrm{SO}}_4$

Name the following compounds. Also, write the symbols/formulas of the ions present in them.

${\mathrm{CuSO}}_4$

What is the difference between a cation and an anion? Give examples.

Explain the difference between $2\mathrm{N}$ and ${\mathrm{N}}_2$.

What is meant by a chemical formula? Write the formula of three elements and two compounds.

What is a molecule? Explain with an example.