WILL GIVE BRAINLIEST Which of the following statements is true? The sun uses some of its own mass during fusion reactions. During fission, hydrogen is split apart into helium. U-235 is created from nuclear fusion reactions. Exothermic reactions absorb heat and light.

what are the choices?

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

answer; 4 electrons;

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.