30 miles per gallon of gas regular unlead is 1.491 gallon mrs. baker drive on 15.00 answer in significant figures

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

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.