A. The steps you take to complete the experiment. B. The process scientists follow to complete an investigation (question, hypothesis, materials,
procedure.
C. Things you need to complete your experiment
D. The results of the experiment.
E. The information you collect from the experiment (usually in numbers)
F. To repeat the experiment
G. Watching and noticing events that happen during an experiment
H. A prediction about what will happen with the experiment
I. An experiment designed to answer a question
J. Parts of an experiment that can be changed and can affect the results of an experiment

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

In pqr m< p=60 m< q= 30 and m

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)