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

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1.

The mass number of \(Cl-37\) is \(37\) and number of protons is \(17\), then the number of neutrons is

\(35\)
\(20\)
\(37\)
\(17\)

2.

The modern method used to determine the mass of an atom is

mass spectrometry
UV spectroscopy
infrared spectroscopy
None of these

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