Nuclear Structure Basics

Z, A, isotopes, and nuclear composition. Ideal for students preparing board exams and competitive tests.

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Nuclear Structure Basics
QUESTION NO 01
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de Broglie wavelength of a particle is?

Answer: h/p
λ = h/p for matter waves.
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QUESTION NO 02
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Bohr model successfully explained spectra of?

Answer: Hydrogen-like atoms
Bohr's model works well for hydrogen-like (one-electron) systems.
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QUESTION NO 03
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Atomic number Z equals number of?

Answer: Protons in the nucleus
Z = number of protons (defines the element).
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QUESTION NO 04
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Isotopes have same?

Answer: Atomic number but different mass number
Isotopes: same Z, different N (hence different A).
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QUESTION NO 05
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Radioactivity is?

Answer: Spontaneous nuclear decay
Radioactive decay is spontaneous transformation of unstable nuclei.
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QUESTION NO 06
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Alpha particle is?

Answer: Helium nucleus (2p+2n)
α = ⁴He nucleus.
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QUESTION NO 07
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Beta-minus particle is?

Answer: Electron
β⁻ emission sends out an electron (and antineutrino).
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QUESTION NO 08
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Gamma rays are?

Answer: High-energy photons
γ radiation is electromagnetic radiation from nuclei.
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QUESTION NO 09
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Half-life is the time for?

Answer: Half the radioactive nuclei to decay
T½ is time for N → N/2.
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QUESTION NO 10
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E = mc² relates?

Answer: Mass and energy equivalence
Rest energy E₀ = mc²; mass–energy equivalence.
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Published By

Shahzad Mahota

@shahzad-mahota

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