<span>Since Astatine is in period 7 and Te is in period 6, I'm going with At because it has 7 energy levels.</span>
False, other planets have things we have not discovered yet, but for one thing for sure there are storms and hurricanes on other planets as well.
Answer:
placing the reactants on a hot plate
Explanation:
If the temperature goes up, the reaction rate will increase. Because the particle will move faster and makes the kinetic energy larger.
B.)<span>A doctor would use technetium-99m because a short half-life indicates a quick measurement, and a geologist would use rubidium-87 because a longer half-life means that there is a longer time to measure old rock. </span>
