Chemistry

Problem

Radiation coming from transitions

n = 2

n = 1

of hydrogen atoms fall on

\text{He}^+

ions in

n = 1

and

n = 2

states. The possible transition of helium ions as they absorb energy from the radiation is : a.

n = 2 \to n = 3

n = 1 \to n = 4

n = 2 \to n = 5

n = 2 \to n = 4