140.116 u ± 0.001 u is the answer
The correct answer is B. Fusion only happens between small atoms. Thus, hydrogen-2 and hydrogen-3 can undergo fusion. Fusion reaction happens when two or more nuclei combine or collide to form an element with a higher atomic number. In this process, some of the matter of the fusing nuclei is converted to energy.
MOLECULE: Smallest particle of a substance that has the properties of that substance (usually a compound); also, a particle composed of two or more atoms united by chemical bonds. PHYSICAL CHANGE: Any change in matter that does not destroy the identity of a substance, nor change its characteristic chemical properties.
Explanation:
conservation of mass that states that matter cannot be created or destroyed,it is consvered.