A metal conducts heat in a similar way to electricity so, as you touch it, it draws heat from your body and makes your hand feel
cold. Plastics don't have to conduct heat so they don't draw heat from your body as efficiently, that's why a piece of plastic
feels than a piece of metal even if it's at the same temperature.
A)
long-chain molecules; warmer
B)
free electrons, warmer
o
valence electrons, colder
a crystalline lattice; colder
What is the answer please??

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