Start learning →

The ionisation energy of hydrogen from its ground state is approximately:

A1.6 eV
B3.4 eV
C10.2 eV
D13.6 eV
Answer & Solution
Correct answer: D. 13.6 eV
Energy to take electron from n=1 to ∞: 13.6 eV.
Practise this question with Quill — CBSE Class 9 →

Keep practising Structure of the Atom

Browse all Structure of the Atom questions for CBSE Class 9, or explore more Science topics.

Start a Structure of the Atom lesson →
Related questions
Pick the right answer, quicklySpot the one that does not fitIsotope or isobar?Fill the gaps on atomic structureTrue or false about the atomSort each particle by where it sitsOrder the gold foil experimentMatch each scientist to the discovery