Nuclear Science Top MCQs – 3

Atoms of an element differ from those of all other elements in
(A) Atomic number and electronic configuration
(B) Number of neutrons and number of valence electrons
(C) Atomic number and number of valence electrons
(D) Number of neutrons and electronic configuration
Answer: Option A

Which of the following rays are more penetrating?
(A) Beta rays
(B) Alpha rays
(C) Gamma rays
(D) X-rays
Answer: Option C

According to Avogadro’s Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called _________.
(A) A molecule
(B) A cation
(C) An anion
(D) An atom
Answer: Option A

The dark lines in the solar spectrum are due to
(A) Absorption of corresponding wavelengths by the outer layers of the sun
(B) Destructive interference between waves of certain definite wavelengths
(C) Absorption of corresponding wavelengths by the prism used in the photograph
(D) Absence of corresponding wavelengths from the light emitted by the core of the sun Answer: Option A