Question

Which one has least ionisation potential?
(a) Ne (b) N
(c) O (d) F

Answer 1

Answer:

Ne

Explanation:

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Answer 2

Least ionization potential will be of oxygen.

Explanation:

• Ionization potential is the amount of energy that is required to be supplied to the atom to take an electron out of the atom.

• Ionization potential depends on two factors - size of atom and electronic configuration.

• Half filled and full filled orbitals are more stable.

• Again, smaller sized atoms attract the electrons more than lesser sized atoms.

• So they have effects on ionisation potential.

• Thus, fluorine being smallest sized atom have higher ionization potential.

• Neon have full filled orbital whereas nitrogen has half filled orbital.

• So they are stable.

• But oxygen doesn't have any of these characteristics.

• So it has lowest ionization potential.

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