NDA General Science Chemistry Questions Part 1

Question : 40 of 100

Marks: +1, -0

Which one of the following statements is correct?

[NDA II 2015]

Rutherford's alpha-particle scattering experiment led to the discovery of electron
J J Thomson suggested that the nucleus of an atom contains protons
The atomic number of an element is the same as the number of protons in the nucleus of its atom
The mass number of an atom is equal to the number of electrons in its shells

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