Which word means a process in which some substances change into different substances?

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?