Ms. bristol measured the mass of a closed beaker containing several ice cubes. the mass was 100 g. an hour later, after the ice cubes had melted, ms. bristol measured the mass of the beaker again. what was the mass of the beaker the second time?

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

a corroding iron, if that's one of your choices