Why do carbs and fats have the same atoms, but store different amount of energy?

Why is an elements atomic mass not listed as a whole number on the periodic table

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true