Question

How many electron pairs are shared between fluorine molecules?

Answer 1

Florine molecules:

1. ${ }_{\circ }^{\circ }\underset{\circ \circ }{\overset{\circ \circ }{F}}-\underset{\circ \circ }{\overset{\circ \circ }{F}}{}_{\circ }{}^{\circ } ^{ }$
2. There is only one pair of electrons shared between fluorine molecules.
3. Electronic configuration:${}_9\mathrm{F}\to 2,7$
4. Since valence electron is $7$, so $\mathrm{F}$ atom will share $1$ electron from other $\mathrm{F}$ atom to obtain octet state.