Pairs of electrons are shared in
called bond order.
bond. the actual number of pairs is

two atoms

Explanation:

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge