Why do chemists use the Lewis symbols to represent chlorine and sodium rather than drawing the electron diagrams of each element before and after the reaction?
A) Lewis symbols are easier to use.
B) Lewis symbols are more scientific.
C) Lewis symbols are more accurate.
D) Lewis symbols are more abstract.
Question 2
When doing a risk-benefit analysis and determining DQ, which situation is often the most difficult to evaluate from both an individual and societal perspective?
A) small benefit and high risk
B) large benefit and high risk
C) large benefit and low risk
D) All are equally difficult to evaluate.
The deer mouse and the African elephant represent extremes among mammals of r versus K selection.
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If 120 mg of sodium-24 is administered for medical diagnosis, how much of the nu
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