Which of the following are isotopes?
(a) 80 Br. (b)8°Br-1 (c) 79Br (d) 80Se

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Helium decays to form lithium. which equation correctly describes this decay?