Plz this assignment is due !
what are some scientists use to determine if a change was physical or
chemical

Newtons second law deals most cosely with

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)