Explain infrared spectrum chart with labels and details.

The radiation of the wavelengths as below is used in the UV-Vis-Near-IR, the microwave and NMR spectrometers. Calculate the energy per photon for the radiation of the following wavelengths: a) 1.5 m (NMR radiation); b) 1.5 mm (microwave radiation); c) 1.5 μm (near IR radiation);

Why do you think some of the wavelengths of light from the LED are capable of making the paper glow in the dark and others are not (hint: how glow in the dark works paragraph at the start of this section)? Remember that light must be absorbed to excite the electron, then when the electron relaxes it emits excess energy as light. Why is white light effective for activating a glow in the dark object?

How many valence electrons do each of the following atoms have: Sr, Se? Briefly describe your rationale.

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