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Elements

What are non-...

Question

What are non-metals? Name any four non-metals.

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Solution

Non-metals - The group of elements that occur as solids and gases shows properties opposite to that of metals but have some unique properties like fluidity are called non-metals.
Four non-metals are:
Hydrogen
Nitrogen
Oxygen
Sulfur

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(a) What are metals ? Name five metals.

(b) What are non-metals ? Name five non-metals.

Q. Question 30
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous; non-malleable and are coloured.
(a) Name a lustrous non-metal.
(b) Name a non-metal which exists as a liquid at room temperature.
(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
(d) Name a non-metal which is known to form the largest number of compounds.
(e) Name a non-metal other than carbon which shows allotropy.
(f) Name a non-metal which is required for combustion.

Q. (a) Define non-metals. Give five examples of non-metals.
(b) Name a non-metal which conducts electricity.
(c) Name a non-metal having lustre (shining surface).
(d) Name a non-metal which is extremely hard.
(e) How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?

Q. Molecular compounds are usually formed by the combination between :
(a) a metal and a non-metal
(b) two different non-metals
(c) two different metals
(d) any two gaseous elements

Q. Name two non-metals which are both brittle and non-ductile.

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