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Which of the following are true for an element?(i) Atomic number = number of protons + number of electrons(ii) Mass number = number of protons + number of neutrons(iii) Atomic mass = number of protons = number of neutrons(iv) Atomic number = number of protons = number of electronsA. (i) and (ii)B. (i) and (iii)C. (ii) and (iii)D. (ii) and (iv) |
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Answer» Mass number is always equal to the number of protons plus the number of Hence, option D is correct. |
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