DIFFERENCE BETWEEN METALS AND NON METALS AND CONCEPT OF METALLOIDS

DIFFERENCE BETWEEN METALS AND NON METALS:

 

SR. NO.

METALS NON METALS
1. They are hard but the exception with sodium which is soft. They are brittle but diamond is very hard.
2. They are solid with the exception of mercury. Mercury is liquid at room temperature. They are available in all the states of matter… solid, liquid and gas.
3. They have metallic shine. They have nonmetallic shine.
4. Metals are good conductor of heat and electricity. Nonmetals are bad conductor of heat and electricity but graphite is good conductor of heat and electricity.
5. Metals are ductile because they can cut into thin wires. Nonmetals are non-ductile because they cannot cut into thin wires.
6. Metals are malleable because they can be easily hammered into thin sheets. Nonmetals are non-malleable.
7. Metals have high melting and boiling point. Nonmetals have low melting and boiling point but diamond has high melting and boiling point.
8. When they are reacted with oxygen, they form oxides with basic nature.

2Na+O2àNa2O

Na2O +H2Oà2NaOH(Base)

When they are reacted with oxygen, they form oxides with acidic nature.

C+O2àCO2

CO2+H2OàH2CO3(Acid)

METALLOIDS:

For example:

Symbol of element B Si Ge As Sb Te At
Element name Boron Silicon Germanium Arsenic Antimony Tellurium Astatine
Atomic number 5 14 32 33 51 52 210

Metalloids are economically important because of their unique connectivity properties. They only partially conduct electricity. Due to this property they are valuable in the semi-conductor and complex chip industry.

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