what are the charges for ions formed in groups 1 2 13 14 15 16 17 and 18 in order to achieve a noble gas electron configuration

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

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)

  the mississippians were considered to be  horticulturalists, which means they were