Calculate the wavelength of light that has a frequency of 3 × 1012 s–1. A 2 x 10-4 m b 4 x 1020 m c 2,800 m d 1 x 10-4 m

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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