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An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Individuals within populations exhibit some diversity. as a result of possessing slightly different traits, some individuals are better able to survive and reproduce than others. if these individuals changes in the characteristics of the population may occur over time. the cumulative change in these characteristics is known as