Which one of the following statements is correct?

Question: Which one of the following statements is correct?

(a) Rutherford’s alpha-particle scattering experiment led to the discovery of electrons

(b) J J Thomson suggested that the nucleus of an atom contains protons

(c) The atomic number of an element is the same as the number of protons in the nucleus of its atom

(d) The mass number of an atom is equal to the number of electrons in its shells

Answer: (c) The atomic number of an element is the same as the number of protons in the nucleus of its atom

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