Boron (B) has two isotopes, boron-10 and boron-11. The atomic weight of boron is the . combined masses of boron-10 and boron-11 average number of neutrons in boron-10 and boron-11 weighted average of the masses of boron-10 and boron-11 mass of boron-10 minus the mass of boron-11

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

i'm pretty sure it is letter c.) car