Which of the following has lowest ionisation enthalpy?
(a)O (b)F
(c)Ne (d)Na
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Sodium (Na) has the lowest ionization enthalpy.
Why does sodium have low ionization enthalpy?
- Sodium is an important member of the periodic table.
- It has the atomic number 11 and its electronic configuration is 1s^2, 2s^2, 2p^6, and 3s^1.
- As sodium has only one electron in the valence orbital therefore a very low amount of energy would be required to remove it.
- This energy is called ionization energy.
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