A hydrogen atom in its ground state is excited to the state of energy E3 by an electron colliding with it. The minimum energy that the colliding electron must have is
A. 10.2 eV
B. 12.09 eV
C. 12.5 eV
D. 13.6 eV.
Answer:B
A hydrogen atom in its ground state is excited to the state of energy E3 by an electron colliding with it. The minimum energy that the colliding electron must have is
A. 10.2 eV B. 12.09 eV C. 12.5 eV D. 13.6 eV.