- a) calculate the average atomic mass of the element she found on mars
b) predict the identity of this element and determine the number of protons that are in one atom
c) describe the relative size of this atom compared to an atom of Calcium. Justify your answer.

1. r.a.m = 86×10/100 + 87× 7/100 + 88× 83/100.

860/100 +_607/100 + 7304/100.

8.6+6.07+72.16.

=86.83

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 .