Write the answer with the correct number of significant digits. Don't use any commas in your answer. Only use a decimal point in your answer if it is necessary to show the correct number of significant digits.
386 x 21 =

reakjhfhrchrb4774747474774474

Explanation:

effdvfvf3737373

what are the two models

explanation:

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