Answer:
Metals: (i) Except mercury and
gallium, all other metals are found in solid state at room temperature.
(ii) They are good
conductor of heat and electricity.
(iii) They
are malleable and ductile.
(iv) Mostly
metals have high density. However, lithium, sodium and potassium have low density
and float on water.
Non-metals;
(i) Six of the non-metals C, B, P, S, Se and iodine are in solid state. Bromine
is the only non-metal found in liquid state. The remaining non-metals nitrogen,
oxygen, fluorine, chlorine, hydrogen and noble gases are found in gaseous
state.
(ii) They
are brittle having low melting and boiling points except carbon and boron.
(iii) They are poor
conductor of heat and electricity.
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