Question

Which of the following has lowest ionisation enthalpy?

(a)O (b)F

(c)Ne (d)Na​

Answer 1

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.

#SPJ2