Question

The energy required to remove an electron from the pure gaseous atom is called___​

Answer 1

The energy required to remove an electron from the pure gaseous atom is called Ionisation energy.

• The energy required to remove an electron from an isolated gaseous atom and convert it into a positively charged gaseous ion is called ionisation energy.
• It is easier to remove electrons from atoms with small ionization energy, so they will form cations more often in chemical reactions.
• The ionisation energy is also known as ionisation potential.