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Q.
If energy required to remove one of the two electrons from $He$ atom is $29.5 \,eV$, then what is the value of energy required to convert a helium atom into $\alpha$-particle?
Atoms
Solution:
Energy needed to convert $He ^{+}$ion to $He ^{2+}$ is $=E_{0} Z^{2}$
$=13.6 \times 4$
Hence total energy to create alpha particle of out of helium atom is
$E_{\text {total }}=13.6 \times 4+29.5$
$=83.9\, eV$