(80 points - will mark brainliest)

what do elements li, be, b, n, c, o, & f have in common?

The symbols, Li, Be, B, C, N, O, F, and Ne are all in the same period (row). The periods are numbered from 1 through 7. The symbols Li, Be, B, C, N, O, F, and Ne are all in period 2.
Elements in period 2 all have two energy levels surrounding their nucleus. The period number always equals the number of energy levels that the atoms of an element in that period have.

Hope this helped! Mark me Brianliest please:)

A) the enthralling of formation for pure element in its standard state is always positivehope this : )