Containers of ice cream are sold by volume, not by weight. some ice cream manufacturers pump air into the ice cream before packaging it. why does this practice make the ice cream more expensive to the consumer? a) air weighs more than ice cream does. b) air weighs less than ice cream does. c) after air is pumped into ice cream, the mixture occupies a greater volume than the ice cream alone did. d) after air is pumped into ice cream, the mixture occupies a smaller volume than the ice cream alone did.

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