What are the weakest attractions between molecules?
a. ionic forces
c. covalent forces
b. van der waals forces
d. hydrogen forces

Vanderwaal forces

Explanation:

The weakest attractions between molecules is called Vanderwaal forces. They are WEAK intermolecular (that is they exists between two or more molecules) force of attraction that exists between liquids, organic solids and gases. Examples includes the dipole-dipole attraction and hydrogen bonding

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.