Click on the element in the periodic table to
explore the atomic radii of elements from period 3
and group 17. fill in the missing values in the
table so you can compare the atomic radii of the
elements. after the table is filled in, compare the
values in each column.

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

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .