  Previously, it was predicted that the parity-violating energy difference
(PVED) between enantiomers and the molecular electron chirality (MEC), which is
the integrated value of the electron chirality density over the entire molecule
are enhanced for ionization or electronic excitation. Following the
confirmation of the enhancement of the PVED by electronic excitation in our
previous papers, the present work confirms that electronic excitation enhances
the MEC for H$_2$Te$_2$ and H$_2$Se$_2$. The PVED in the first excited state is
explained by the contribution from the highest occupied molecular orbital if
the PVED contribution from the highest occupied molecular orbital in the ground
state dominates over any other contributions. In this paper, it is checked
whether this explanation can also be applicable to the MEC. It is also reported
that the MEC is not the simple sum of contributions from each atom and the
mixing by the superposition between atomic orbitals of different atoms is
important.
