Be^3+ has a single electron. Calculate the frequencies and wavelengths of light in the emission spectrum of the ion for the first three lines of each of the series that are analogous to the Lyman and the Balmer series of neutral hydrogen. In what region of the spectrum does this radiation lie?

Electron microscopes are better than visible light microscopes for examining things at atomic scales because of the small wavelengths of electrons. Explain why visible light cannot be used to look at atoms, based on what you know about the wavelengths of light.

By comparing the two images, what can you conclude about Io’s volcanoes?
a. Every black spot in the visible image has a bright spot in the infrared image, so all of Io’s volcanoes were active when the photos were taken.
b. There are more black spots in the visible image than bright spots in the infrared image, so many of Io’s volcanoes were inactive when the photos were taken.
c. There are more bright spots in the infrared image than black spots in the visible image, so new eruptions must have started after the visible photo was taken.

Choose the letter of the best answer. Which statement best applies to chromosomes? A. They carry out respiration. B. They consist mostly of the pigment chlorophyll. C. Their structure is visible only during interphase. D. They become visible during the mitosis stage of the cell cycle.

The universe is filled with thermal radiation, which has a blackbody spectrum at an effective temperature of 2.7 K. What is the peak wavelength of this radiation? What is the energy (in eV) of quanta at the peak wavelength? In what region of the electromagnetic spectrum is this peak wavelength?

Is visible light the only type of EM radiation that can cause the photoelectric effect?

The parts of the electromagnetic spectrum are commonly described in one of three ways. What are these ways?

The filament in a clear incandescent light bulb radiates visible light at a power of 5.00 W. Model the glass part of the bulb as a sphere of radius $r _ { 0 } = 3.00 \mathrm { cm }$ and calculate the amount of electromagnetic energy from visible light inside the bulb.

On what part of the liberalconservative spectrum would you place yourself? Why?

Name the type of pigment that becomes visible in a leaf when chlorophyll begins to degrade.

Predict the relative intensities of the three peaks in the mass spectrum of dichloromethane at $m / z=84,86$, and 88 .

A diffraction grating that has 2000 slits per centimeter is used to analyze the spectrum of mercury. What is the angular separation in the first-order spectrum of the two lines that have wavelengths equal to $579 \mathrm{~nm}$ and $577 \mathrm{~nm}$?

A compound with the molecular formula $\mathrm{C}_{12} \mathrm{H}_{24}$ exhibits a $^{1} \mathrm{H}$ NMR spectrum with only one signal and a $^{13} \mathrm{C}$ NMR spectrum with two signals. Deduce the structure of this ­compound.

What portions of an IR spectrum are referred to as the functional group region and the fingerprint region?