Atomic Nucleus|. Practice MCQs Physics for Mdcat By Engr. Kamran Soomro | mosaicbro.com
Atomic Nucleus|. Practice MCQs Physics for Mdcat By Engr. Kamran Soomro
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Review Answers:
64
According to Rutherford atomic model, the positive charge in an atom:
Correct Answer:A
Explanation:
Rutherford's model placed positive charge in a tiny, dense nucleus.
65
For an atom having atomic number Z and atomic weight A, the number of neutrons in the nucleus is:
Correct Answer:A
Explanation:
Neutron count = Mass number (A) − Atomic number (Z).
66
For an atom having atomic number Z and atomic weight A, the charge on the nucleus is:
Correct Answer:C
Explanation:
Nuclear charge = +Ze, where Z is the atomic number (proton count).
67
For an atom having atomic number Z and atomic weight A, the number of electrons in the atom is:
Correct Answer:C
Explanation:
In a neutral atom, electrons = protons = atomic number (Z).
68
Mass of proton is of the order of:
Correct Answer:D
Explanation:
Proton mass ≈ $1.67 \times 10^{-27}\text{kg}$ ≈ $10^{-24}\text{g}$ ≈ $10^{3}\text{mg}$ (options a, b, c are incorrect units but closest to d).