Question

How many non-metals are solids, liquids and gases?
A.$5,2,11$
B.$5,1,11$
C.$6,2,12$
D.$5,1,12$

Answer 1

We know that a nonmetal is a chemical element which lacks the characteristics features of a metal. A nonmetal has a low melting point, boiling point, and density. A nonmetal is brittle when solid and shows poor thermal conductivity and electrical conductivity.

Complete step by step answer:

We know that the nonmetal elements are present at the upper right-hand corner of the periodic table. Hydrogen is as a nonmetal at normal temperature and pressure and is part of the nonmetal group.
A chemical element which does not show metallic properties and has the ability of forming anions, acid oxides, acids, and stable hydrogen compounds are non-metals.
The list of non-metals present in the periodic table is,
Hydrogen
Helium
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Phosphorus
Sulfur
Chlorine
Argon
Selenium
Bromine
Iodine
Krypton
Xenon
Radon
In the above list,
The elements that are present in solid state are carbon, sulfur, phosphorus, iodine and selenium.
The element that is present in liquid state is bromine.
The elements that are present in gaseous state are hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon.
So, there are totally 5 solids, 1 liquid, and 11 gaseous elements.
Therefore, option (B) is correct.

Note:
Now we can see the some of the uses of non-metals are,
We can prepare ammonia, nitric acid from nitrogen.
Chlorine is used in the purification of water.
We can use hydrogen as a rock fuel.
Carbon is used as graphite to make pencils.
We can use sulfur to prepare sulfuric acid.