General Science - Questions (Section-3)
16According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
A. a moleculeB. a cation
C. an anion D. an atom
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17Atoms of an element differ from those of all other elements in
A. atomic number and electronic configurationB. number of neutrons and number of valence electrons
C. atomic number and number of valence electrons D. number of neutrons and electronic configuration
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18In an atomic nucleus, neutrons and protons are held together by
A. gravitational forcesB. exchange forces
C. coulombic forces D. magnetic forces
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19'No two electrons in an atom can have the same set of four quantum numbers' is
A. Newton's lawB. Bohr's law
C. Aufbau principle D. Pauli's exclusion principle
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20Nuclear fission is caused by the impact of
A. neutronB. proton
C. deuteron D. electron
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