Practice Test | Kullabs.com
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  • The atomic number of boron is ______.

    4
    5
    3
    2
  • The energy of the shell ______ as we move away from the nucleus.

    increases
    cannot be predicted because it depends of individual atom
    does not change
    decreases
  • The number of electrons that can be accommodated in the third shell is ______.

    8
    2
    18
    16
  • The process of distribution of electrons in the various shell of the atom is called _______.

    electron distribution
    valency
    electron assimilation
    electronic configuration
  • Which one of the following is correct?

    Number of protons = Mass number - Atomic number
    Number of neutrons = Mass number + Atomic number
    Number of neutrons = Mass number - Atomic number
    Number of electrons = Mass number - Atomic number
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