Among the following elements, which one has the highest ionisation potential?
A
Hydrogen
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Lithium
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Potassium
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Sodium
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A Hydrogen Ionization potential is the amount of energy required to remove an electron from an atom or a molecule in the gaseous state. Hydrogen has only one electron in its valence shell or s orbital and ionisation energy decreases from top to bottom in a group as the atomic size increases and as electron cloud goes farther away from the nucleus. So, hydrogen has the highest ionisation potential.