Find the element on the periodic table of elements.
metallic
period 4
and has 20 electr...
Answers: 2
Chemistry, 21.06.2019 22:30, monnn91351
Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.
Answers: 2
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