GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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C
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Cb
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Ca
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Cn
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Detailed explanation-1: -carbon (C), nonmetallic chemical element in Group 14 (IVa) of the periodic table. Although widely distributed in nature, carbon is not particularly plentiful-it makes up only about 0.025 percent of Earth’s crust-yet it forms more compounds than all the other elements combined.
Detailed explanation-2: -Carbon is unique among the elements in its ability to form strongly bonded chains, sealed off by hydrogen atoms. These hydrocarbons, extracted naturally as fossil fuels (coal, oil and natural gas), are mostly used as fuels.
Detailed explanation-3: –The atomic number of calcium is 20 and the symbol of calcium is Ca. The atomic number of carbon is 6 and the symbol of carbon is C. The atomic number of copper is 29 and the symbol of copper is Cu.