Question

State the differences of the given substances: Water, Iron and Oxygen

Answer 1

water is liquid
iron is solid
oxygen is gas.
water is a compound
iron is a metal and element
oxygen is an element

Answer 2

water : it has formula H2O .it is a compound made up of hydrogen and oxygen. it is in liquid state.
iron : it has formula Fe. it is a single atom. it is in solid state
Oxygen: it has formula O2. it is also single atom. it is in gaseous state