PSYCHOLOGY What is TRUE about an experimental study? It must be conducted in a very natural environment. Researchers should avoid trying to control the setting. The resulting conclusions will always be reliable and replicable. Its variables have to mimic those of the real situation.

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periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.