Question : Identify whether the given statements about ionisation energy are correct or incorrect.

Statement A: The ionisation energy of an atom is the amount of energy that is required to remove an electron from a mole of atoms in the gas phase.

Statement B: The ionisation energy increases from top to bottom in groups and decreases from left to right across a period.

Option 1: Both Statements A and B are correct.

Option 2: Only Statement A is correct.

Option 3: Both Statements A and B are incorrect.

Option 4: Only Statement B is correct.


Team Careers360 3rd Jan, 2024
Answer (1)
Team Careers360 9th Jan, 2024

Correct Answer: Only Statement A is correct.


Solution : The correct answer is Only Statement A is correct .

The amount of energy required for an isolated, gaseous atom in the ground electronic state to discharge an electron and produce a cation is known as the ionisation energy. This energy is needed for each atom in a mole to lose one electron.

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