An isotope undergoes radioactive decay. the new isotope that forms has an atomic number that is 2 less than the original isotope’s.
which kind of decay has occurred, and how do you know?
alpha decay because alpha particles have a large mass
beta decay because beta particles can have negative charge
alpha decay because alpha particles have two protons and two neutrons
gamma decay because gamma rays are photons

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !