Which is an example of the kinetic-molecular theory not holding true for a gas? a. the average kinetic energy of particles depends only on the temperature. b. the particles in a gas travel in straight lines in a continuous, random motion. c. the attraction between particles causes a gas to condense at low temperatures. d. the particles in a gas make up a small portion of the total volume of the gas.

C; The attraction between particles causes a gas to condense at low temperatures.

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