Which of the following statements is accurate? a. amplitude of longitudinal waves is measured at right angles to the direction of the travel of the wave and represents the maximum distance the molecule has moved from its normal position. b. the wavelength of both traverse and longitudinal waves is measured parallel to the direction of the travel of the wave. c. compressions and rarefactions occur throughout a transverse wave. d. sound waves passing through the air will do so as transverse waves, which vibrate vertically and still retain their horizontal positions.

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

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