GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Chemical symbols for two elements that occur in the earth’s atmosphere are
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Si and Al
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Ar and Al
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O and N
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H and N
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Explanation:
Detailed explanation-1: -Thus, we use O2 as the formula for oxygen, N2 for nitrogen, and so on. Among the nonmetals, sulfur exists as S8 and phosphorus is found as P4.
Detailed explanation-2: -Proteins are made of carbon, hydrogen, oxygen, and nitrogen (CHON).
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