Differences between metals and non-metals

S.N	Metals	Non- metals
1.	Metals are solid at ordinary temperature except mercury.	Non-metals are found in all three states.
2.	They possess metallic lustre except lithium.	They do not possess any metallic lustre except iodine and graphite.
3.	They are generally hard except sodium and potassium.	They are generally soft except diamond.
4.	They are hardly broken into pieces.	They can be broken easily.
5.	Boiling point is high.	Boiling point is low.
6.	Melting point is high.	Melting point is low.
7.	They emit sonorous sound when struck with hammer.	They do not emit such sound.
8.	They are malleable.	They are non-malleable.
9.	They are generally good conductors of heat and electricity.	They are poor conductors except graphite.
10.	They are ductile.	They are non-ductile.
11.	Molecules are closely packed.	Molecules are not packed closely as in metals.
12.	They have high specific gravity except Li, Na, K, Ca, etc.	They have low specific gravity except diamond.
13.	They generally form alloys.	They do not form alloys generally.
14.	They form basic oxides except few metals.	They form acidic oxides except few nonmetals.
15.	Metals rarely combine with hydrogen to form unstable hydrides.	They usually combine with hydrogen to give stable hydrides.
16.	Most of the metals give salt and hydrogen gas after reacting with dilute acids.	They do not form salt and hydrogen with acids.
17.	They are heavy except Na, K, Mg.	They are generally light to weight.
18.	They are located in s, p, d and f blocks.	They are located in s and p blocks.
19.	They are found in the left side of periodic table.	They are found in the right side of periodic table.

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References:

i) https://tutormate.in/cbse-class-10-chemistry/difference-between-metals-and-non-metals/