Stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. Based on your data, is the newly discovered star a younger star? Explain your answer.

i have no clue hope you find the answer

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.