Question

Name the elements with the help of following properties:
1. The non-metal which is lustrous
2. The non-metal which is liquid
3. Non-metal which is conductor of electricity
4. The non-metal which is hardest natural substance known

Answer 1

Hint – In order to get the answers we need to know that non-metals are elements except metals and lustrous means the state or quality of shining by reflecting light whereas, liquid is one of the four fundamental states of matter and is the only state with a definite volume but no fixed shape. The good conductor of electricity is that in which electrons are freer to move.

Complete answer:

The hardest elements are those which have strong bonds between the atoms of the elements. Knowing this you will get all the answers.
1. The non-metal which is lustrous – Graphite.
Since graphite is shiny and has polished surfaces.
2. The non-metal which is liquid – Bromine.
It is liquid only at room temperature.
3. Non-metal which is conductor of electricity – Graphite.
Since graphite is non-metal with free electrons present in it.
4. The non-metal which is the hardest natural substance known – Diamond.
The outermost shell of each carbon atom has four electrons. In diamond, these electrons are shared with four other carbon atoms to form very strong chemical bonds resulting in an extremely rigid tetrahedral crystal.

Note – In this question you just need to learn the properties of some common elements and examples of properties of elements. The only way to get information is to study the properties of non-metals and its examples. Periodic table will be very helpful if it is read accordingly. Knowing this, most of your problems will be solved.