6.the sharing of electron from one atom to another.

7.elements that lose electrons
.
8.elements that gain electrons,

9.bonds form when the electrons are not equally shared

10.bonds form when the electrons are equally shared,

11.sharing of free electrons among structure of positively charge lons.

12.energy required to remove the valence electron from the
outermost shell.

13.measure the tendency of the atom to attract electron.

14.become cation when lose electron.

15.become anion when accept electrons​