GK
ELEMENTS COMPOUNDS SUBSTANCES METALS AND NON METALS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
rays
|
|
|
heat
|
|
|
light
|
|
|
electricity
|
Detailed explanation-1: -Non-metals vary greatly in appearance. They do not have lustre. As it does not have any free electrons light falling on non-metals does not reflect and hence non-metals are not shiny. Hence, they have a very dull appearance.
Detailed explanation-2: -Non-metals do not have free electrons to lose, rather they gain the electrons, resulting in no reflection of the light.
Detailed explanation-3: -The surface of some metals acquires a dull appearance when exposed to air for a long time because metals from a thin layer of oxides, carbonates or sulphide on their surface by the slow action of various gases present in the air that make the dull appearance.
Detailed explanation-4: -Non-metals can be gases, liquids or solids. Non-metals are dull in colour, not shiny like metals.
Detailed explanation-5: -Luster: Objects made of nonmetals are usually dull in their appearance. Some examples are solid sulfur and carbon nuggets. Malleability: Nonmetals are usually more brittle than metals-they cannot be molded or stretched like metals can.