Fluorine (f2) is a(n) molecule because the valence electrons are shared equally between the two fluorine atoms.

Answer;

Non-polar

Fluorine (F2) is a non-polar molecule because the valence electrons are shared equally between the two fluorine atoms.

Explanation;Nonpolar molecules are type of covalent bond are equally shared between two atoms or elements producing no charged ends. Polar molecules are molecules that have an unequal distribution of charges.Non-polar molecules contains only non-polar bonds, or contains polar bonds, but does not have a polar geometry.In fluorine gas or fluorine molecule a non-polar covalent bond is formed when the two atoms in the bond are identical to each other.  The non-polar covalent bond is the unequal sharing of electrons between two identical atoms.

2. they have negligible mass.

The answer is orbit around nucleus