When pyruvate molecules enters the mitochondrion, one of its carbon atoms becomes a part of a molecule of?

As you move from right to left on the periodic table the atomic radius fill in the blank

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.