Water is
An element
A compound.
A mixture.
Both an element and a compound
Water is a compound because it is made up of a single type of molecules which have two different types of atoms, hydrogen and oxygen.
(a) What is meant by (i) elements (ii) compounds, and (iii) mixtures? Write down the names of two elements, two compounds and two mixtures.
(b) Classify the following into elements, compounds and mixtures :
Marble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk