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Atomic Structure - Neutrons MCQs

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Atomic Structure - Neutrons

Atomic Structure - Neutrons MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
Which isotope of hydrogen contains two neutrons?
A. Protium
B. Tritium
C. Deuterium
D. Hydrogen-0
Correct Answer: B
Tritium has one proton and two neutrons.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
Which isotope of hydrogen contains one neutron?
A. Tritium has one neutron
B. Deuterium
C. Protium
D. Helium-3
Correct Answer: B
Deuterium has one proton and one neutron.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
A hydrogen-1 nucleus contains how many neutrons?
A. 2
B. 1
C. 3
D. 0
Correct Answer: D
Ordinary hydrogen (protium) has one proton and no neutrons.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
Which subatomic particle has a mass slightly greater than that of a proton?
A. Electron
B. Neutron
C. Positron
D. Photon
Correct Answer: B
The neutron is slightly more massive than the proton.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
Which force helps bind protons and neutrons together in the nucleus?
A. Frictional force
B. Strong nuclear force
C. Centrifugal force only
D. Buoyant force
Correct Answer: B
At very short nuclear distances, the strong interaction binds nucleons.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
What mainly differs among isotopes of the same element?
A. Number of neutrons
B. Chemical symbol
C. Number of protons
D. Atomic number
Correct Answer: A
Isotopes have the same proton number but different neutron numbers.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
How is neutron number calculated from mass number A and atomic number Z?
A. A × Z
B. A + Z
C. A − Z
D. Z − A
Correct Answer: C
Since mass number is protons plus neutrons and atomic number is protons, N = A − Z.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
Who is credited with the discovery of the neutron in 1932?
A. James Chadwick
B. Michael Faraday
C. J. J. Thomson
D. Robert Hooke
Correct Answer: A
James Chadwick demonstrated the existence of the neutron in 1932.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
Where are neutrons located in an atom?
A. Inside photons
B. Outside the atom only
C. In the nucleus
D. In electron shells only
Correct Answer: C
Neutrons, together with protons, form the atomic nucleus.
CSS - PMS - CCE - PCS - General Science Atomic Structure - Neutrons
What is the electric charge of a neutron?
A. Zero
B. Negative
C. Positive
D. Double positive
Correct Answer: A
A neutron is electrically neutral.
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