METALS AND NON-METALS

METALS AND NON-METALS

 Sr. No. Metals Non-Metals
 1.  Metals are solid at room temperature. Mercury is an exception. Non-Metals are solids, liquids and gases at room temperature.
 2.  These are malleable i.e. These can be changed into thin sheets under a compressive load. Non metals are not malleable. These get crushed under a compressive load.
 3.  These are ductile i.e. These can be changed into wires under a tensile load i.e. these fail only after a significant deformation. Solid non metals  are brittle i.e. These are very weak under a  tensile load.
 4.  These have a shiny surface. These have a dull surface.
 5.  With oxygen, these form basic oxide. With oxygen, these form acidic oxide.
 6.  These have high boiling point. These have low boiling point.
 7.  These have high melting point.  These have low melting point.
 8. Metals displace hydrogen when in contact with an acid. There is no effect of acids on most of the non metals.
 9. These are heavy as these have more density. These are light.
10. Metals are good conductors of heat and electricity. Metals are good conductors of heat and electricity.
11. Metals are costly. Non metals are relatively cheap.
12. Metals are usually harder. Most of the non metals are soft.
13. These are electropositive in nature (these donate electrons) These are electronegative in nature.
14. These are not inert i.e. these are reactive. These are inert.
15. These form chlorides which are electrovalent compounds or ionic compounds. These form chlorides which are covalent compounds.
16. Metals are opaque i.e. you cannot see through even in a thin sheet. Some of these are transparent.
17. Metals produce sound on strike. Non-metals do not produce sound on strike.
18. These get rusted or corroded. These do not get rusted or these are not corroded.
19. These are good reducing agents. These are good oxidizing agents.
20. These have 1 to 3 electrons in their outer shell. These have 4 to 8 electrons in their outer shell.