The mass number is used to calculate the number of —————— in one atom of an element.

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?