SSC MTS EXAM

SSC

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
These elements are dull, brittle, and poor conductors.
A
metals
B
nonmetals
C
metalloids
D
transformers
Explanation: 

Detailed explanation-1: -Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite).

Detailed explanation-2: -Boron. a metalloid. has slight luster and conducts electricity at high temperatures like metal. But like a nonmetal, boron is brittle and does not conduct electricity well at low temperatures.

Detailed explanation-3: -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.

Detailed explanation-4: -Unlike metals, non-metals are poor conductors of heat and electricity. They are brittle and usually dull in color. They sound boring, but they’re actually the coolest. Carbon (C, Z = 6) is one of the least boring elements on the periodic table.

There is 1 question to complete.