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Q: Which of the following pair of number composition is/are correct? I. Atomic Number – Number of Proton II. Mass number – Sum of numbers of neutron and proton
  • A. Only - I
  • B. Neither I nor II
  • C. Both I and II
  • D. Only II
Correct Answer: Option C - Atomic Number– The number of protons present in a neutral atom is called atomic number of that atom (element). Mass Number– The sum of numbers of neutron and proton present in the nucleus of an atom is defined as moss number of that atom (element) Hence, Mass number = Number of protons + Number of neatens.
C. Atomic Number– The number of protons present in a neutral atom is called atomic number of that atom (element). Mass Number– The sum of numbers of neutron and proton present in the nucleus of an atom is defined as moss number of that atom (element) Hence, Mass number = Number of protons + Number of neatens.

Explanations:

Atomic Number– The number of protons present in a neutral atom is called atomic number of that atom (element). Mass Number– The sum of numbers of neutron and proton present in the nucleus of an atom is defined as moss number of that atom (element) Hence, Mass number = Number of protons + Number of neatens.