Atomic Nucleus|. Practice MCQs Physics for Mdcat By Engr. Kamran Soomro | mosaicbro.com

Atomic Nucleus|. Practice MCQs Physics for Mdcat By Engr. Kamran Soomro

7 of 114 questions (Page 1 of 17)

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1 The scientist who discovered electron from the study of the nature of cathode rays was:
Correct Answer: C
Explanation: J.J. Thomson discovered the electron in 1897 through experiments with cathode rays.
2 The nuclear model of the atom was derived partly from experiments involving the scattering of alpha particles performed by:
Correct Answer: C
Explanation: Rutherford's gold foil experiment led to the nuclear model of the atom.
3 Neutrons and Protons in the nucleus are together called:
Correct Answer: C
Explanation: Protons and neutrons are collectively known as nucleons.
4 The bulk of the mass of an atom is concentrated in its:
Correct Answer: D
Explanation: The nucleus contains protons and neutrons, which account for nearly all the mass of an atom.
5 Nuclei having the same nuclear charge but different masses are called:
Correct Answer: A
Explanation: Isotopes have the same atomic number (protons) but different mass numbers (neutrons).
6 An atom of an element differ from an atom of one of its isotopes in the number of:
Correct Answer: B
Explanation: Isotopes differ in the number of neutrons.
7 A naturally occurring disintegration involving the emission of high energy electrons is called:
Correct Answer: B
Explanation: Beta decay involves the emission of electrons or positrons from the nucleus.
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