SSC
CHEMISTRY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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metals
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nonmetals
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metalloids
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transformers
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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.