The atomic number of an element is equal to the number of . . . . . . . . present in the nucleus
A. electrons and protons
B. neutrons
C. electrons
D. protons
Answer: Option D
A. electrons and protons
B. neutrons
C. electrons
D. protons
Answer: Option D
A. James Chandwick
B. Niels Bohr
C. J. J. Thomson
D. Ernest Rutherford
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