Multiple choice

Which of the following factors affect the ionisation potential?

  1. Atomic number and number of neutrons

  2. Atomic size and nuclear charge

  3. Number of valence electrons and atomic weight

  4. Number of neutrons and mass number

  5. Number of protons and relative atomic mass
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B Correct answer
Explanation

Ionisation potential is the energy required to remove one or more electrons from the outermost orbit of an isolated gaseous atom. The smaller the size of the atom, the more difficult it becomes to remove the valence electron due to the attraction of the nuclear charge on the electrons.

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