State three rules for writing the chemical formulae.
(N/A) $(1)$ The valencies or charges on the ions must be balanced.
$(2)$ When a compound consists of a metal and a non-metal,the name or symbol of the metal is written first.
$(3)$ In compounds formed with polyatomic ions,the ion is enclosed in a bracket before writing the number to indicate the ratio. In case the number of the polyatomic ion is one,the bracket is not required.
$(2)$ When a compound consists of a metal and a non-metal,the name or symbol of the metal is written first.
$(3)$ In compounds formed with polyatomic ions,the ion is enclosed in a bracket before writing the number to indicate the ratio. In case the number of the polyatomic ion is one,the bracket is not required.
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Similar Questions
Give the names of the elements present in the following compounds:
$(a)$ Quick lime
$(b)$ Hydrogen bromide
$(c)$ Baking powder
$(d)$ Potassium sulphate
$(a)$ Quick lime
$(b)$ Hydrogen bromide
$(c)$ Baking powder
$(d)$ Potassium sulphate
Medium
View Solution$(a)$ The ratio of hydrogen and oxygen in water is $1:8$ by mass. Find out their ratio by number of atoms in one molecule of water.
(Atomic mass: $H=1 \ u, O=16 \ u)$
$(b)$ Write the formulae of the following compounds:
$(i)$ Ammonium sulphate
$(ii)$ Magnesium chloride
(Given: Ammonium $= NH_{4}^{+}$,Sulphate $= SO_{4}^{2-}$,Magnesium $= Mg^{2+}$,Chloride $= Cl^{-}$)
(Atomic mass: $H=1 \ u, O=16 \ u)$
$(b)$ Write the formulae of the following compounds:
$(i)$ Ammonium sulphate
$(ii)$ Magnesium chloride
(Given: Ammonium $= NH_{4}^{+}$,Sulphate $= SO_{4}^{2-}$,Magnesium $= Mg^{2+}$,Chloride $= Cl^{-}$)
Medium
View SolutionDerive the molecular formula for Ammonium carbonate.
Medium
View SolutionWhich of the following symbols of elements are incorrect? Give their correct symbols:
$(a)$ Cobalt $CO$
$(b)$ Carbon $c$
$(c)$ Aluminium $AL$
$(d)$ Helium $He$
$(e)$ Sodium $So$
$(a)$ Cobalt $CO$
$(b)$ Carbon $c$
$(c)$ Aluminium $AL$
$(d)$ Helium $He$
$(e)$ Sodium $So$
Medium
View SolutionState whether the following statement is true or false:
The chemical formulae of cupric oxide and cuprous oxide are $CuO$ and $Cu_{2}O$ respectively.
The chemical formulae of cupric oxide and cuprous oxide are $CuO$ and $Cu_{2}O$ respectively.
Easy
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