Atoms and molecules: Choose the correct answer — task. Science State Board, Class 10.

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1.

The mass number of \(N-14\) is \(14\) and number of protons is \(7\), then the number of neutrons is

\(14\)
\(7\)
\(6\)
\(8\)

2.

Which element is the most abundant on both the Earth and the human body?

\(O_2\)
Nitrogen
Hydrogen
None of these

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