Calculate the binding energy per nucleon of a 13C carbon atom if the mass of a 13C carbon atom is 13.003355 amu, the mass of a proton is 1.007825 amu, and the mass of a neutron is 1.008665 amu.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.