summary of chapter 4 science 8th class (ncert)
Answers
Answer:
Metals are lustrous whereas non-metals have
no lustre.
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Generally, metals are malleable and ductile.
Non-metals do not have these properties.
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Generally, metals are good conductors of heat
and electricity but non-metals are poor
conductors.
-
On burning, metals react with oxygen to
produce metal oxides which are basic in
nature. Non-metals react with oxygen to
produce non- metallic oxides which are acidic
in nature.
-
Some metals react with water to produce metal
hydroxides and hydrogen gas. Generally, non-
metals do not react with water.
-
Metals react with acids and produce metal
salts and hydrogen gas. Generally, non-metals
do not react with acids.
-
Some metals react with bases to produce
hydrogen gas.
-
More reactive metals displace less reactive
metals from their compounds in aqueous
solutions.
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Metals and non-metals are
Explanation:
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