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## Q. 20.6

Give the electron configuration for the ground state of $C_{2}$ using nonbonding orbitals as much as possible.

## Verified Solution

There are 12 electrons. The electron configuration is
$(1sA)^{2}(1sB)^{2}(2sA)^{2}(2sB)^{2}(π_{u}2p_{x})^{2}(π_{u}2p_{y})^{2}$
The bond order is equal to 2, with four bonding electrons, no antibonding electrons, and eight nonbonding electrons.