What does it mean if an element has a -2 charge? Provide an example of an element that does this and explain why it takes on this charge.

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

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.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?