Question 20 (Essay Worth 10 points) (02.01 MC)
PLEASEEE HELPPP Two different atoms have nine protons each and the same mass. However, one is neutral while the other has a
negative charge. Describe what each atomic structure could be, listing the possible number and location of all
subatomic particles.

Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.