The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of a singly ionsed helium atom would be
A. 13.6 eV
B. 27.2 eV
C. 6.8 eV
D. 54.4 eV
Answer:D
The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of a singly ionsed helium atom would be
A. 13.6 eV B. 27.2 eV C. 6.8 eV D. 54.4 eV