The weakest type of force between particles of a substance is termed

The answer is vanderwaals forces. They are the weak forces of attraction or repulsion between molecules that are close together. This is due to the fact that the electron cloud of an atom keeps shifting and never stays in one position. Therefore, there is always a momentary and differential formation of dipoles in an atom as a result.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6