A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence of this decapeptide. Trypsin digestion gave two fragments with multiple residues (not in order):
T1: Ala, Arg, Phe, Gly, Thr, Trp, Tyr
T2: Lys, Met, Val
Chymotrypsin digestion gave four fragments with multiple residues (not in order):
CT1: Ala, Phe
CT2: Thr, Trp
CT3: Lys, Met, Tyr, Val
CT4: Arg, Gly
N-terminal analysis of the CT1 tetrapeptide indicated that the N-terminal amino acid was Ala. The cyanogen bromide gave only one single amino acid, methionine, and a nanopeptide.

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

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )