Although helium has only electrons in its outer shell, it is grouped with elements that have .

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

Sharon reads two different articles about avocados. the first article, in a weight loss magazine, claims that avocados are unhealthy because they are high in fat. the second article, in an annual publication from a doctors’ group, claims that the fat in avocados is a type that is good for the heart. to assess these claims, which question(s) might sharon ask? check all that apply. is the source of this claim reputable? where are avocados sold? is the source an authority on the subject? which source do avocados come from? how much do avocados cost?

Chemical precipitation occurs when a product is and precipitates out of a solution. by comparison, precipitation reactions require the reactants to be in the solvent.