Stion 1/2 Which of the following is a physical property? A. The boiling point o a certain alcohol is 78 degrees Celsius
B. Diamond is very hard
C. Sugar ferments to form alcohol
D. A metal wire conducts an electric current

14 days is the half-life of phosphorus-32

0.88m hope i am correct : )

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.