Gram molecular mass — task. Science TNSB Mentoring, Class 10.

1.

Which of the following is a polyatomic molecule?

helium
hydrogen
carbon dioxide
glucose

2.

In the nucleus of \(_{20}\textrm{Ca}^{40}\), there are

\(20\) protons and \(40\) neutrons
\(20\) protons and \(20\) neutrons
\(20\) protons and \(40\) electrons
\(40\) protons and \(20\) electrons

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