(! ) what are valence electrons? how do valence electrons determine how reactive an element is?

Compare the composition of the moon's surface with the composition of the earth's surface.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Why does miranda have that particular vision of dr hildesheim answer?