What common characteristic is generally shared by the elements at the center of a period?

The common characteristic that is shareed by the elements found at the center of a period would be that they are the least reactive species. Having lower value of electronegativity, there is less ionization of the atoms which would also contribute to less reactivity.

Least reactive.

Explanation:

The elements in the center of periodic table are least reactive, generally.

They are less electronegative and electropositive as well.

They do not lose electrons easily as they have high ionization energy to act as metals. Also they have low electron affinity as compared to non metals.

Thus they are very less reactive.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it

it is stable as it is in group 0 which have full outer shells of electrons