8) rubidium [kr]5s has an atomic radius of 248pm. tin, another period 5 element, has an
atomic radius of 140pm.
what would the correct atomic radius for xenon be? xenon is also in period 5 and a noble gas.

140 pm.

Explanation:

Xenon is an element under the Noble gases group and on period 7 of the periodic table. This element is most notable for its bright luminescent in light bulbs. Xenon is unique for being the first noble gas element to be synthesized into a compound. Xenon differs from the other noble gases by being heavier and denser than most.

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