Modern Physics 1 Question 37
34. The ratio of the kinetic energy of the $n=2$ electron for the $H$ atom to that of $He^{+}$ion is
$(2008,4$ M)
(a) $1 / 4$
(b) $1 / 2$
(c) 1
(d) 2
Objective Questions II (One or more correct option)
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Solution:
- Kinetic energy $K \propto Z^{2}$
$$ \therefore \quad \frac{K _H}{K _{He^{+}}}=\frac{1}{2}{ }^{2}=\frac{1}{4} $$
