51. Antimony: About 60 percent of antimony goes toward making flameproof compounds for children's clothing, toys, and seat covers. A smaller use of antimony is as a fining agent to remove microscopic bubbles in glass, mostly for TV screens.
52. Tellurium: When paired with cadmium (48), tellurium creates cadmium telluride photovoltaics, and offers a cheap and efficient method of manufacturing solar panels.
53. Iodine: Potassium iodide and silver iodide, two different iodine compounds, are used in film photography. A layer of silver iodide sits directly on the film or photo paper and reacts with white light to complete the image.
54. Xenon: The individual cells in a plasma display—such as the Panasonic VT50—employ a mixture of xenon and neon that electrodes convert into a plasma. Xenon arc lamps are present in IMAX film projection systems.
55. Cesium is used in atomic clocks, which manage time in applications such as cell phone networks. Atomic clocks also aid in the timing of the information flow of the Internet. You can buy a Cesium atomic clock online, though it will cost quite a bit since it is more of a niche item.
56. Barium, typically as barium nitrate, is added to fireworks to turn them green.
58. Cerium is an essential component of phosphors present in TV screens.
61. Promethium: Most promethium is used only for research purposes, but it could be employed in atomic batteries.
62. Samarium: You can find samarium cobalt magnets in small motors, headphones, high-end magnetic pickups for guitars (such as Samarium cobalt noiseless guitar pickups) and related musical instruments.
65. Terbium is another component of LCD-monitor phosphors. It helps to increase the vibrancy of colors, especially green.
66. Dysprosium: Because dysprosium and its compounds are highly susceptible to magnetization, they are employed in various data storage products, such as hard disk drives (including the Seagate Barracuda desktop hard drive).
69. Thulium is rare and expensive, so it's found in few commercial products. However, it has acted as a power source for portable X-ray machines and in parts of microwave equipment.
70. Ytterbium isn’t widely used commercially, but this silvery metal is found in laser technology, specifically in wavelength-tunable solid-state lasers. These lasers cut silicon wafers for solar panels.
71. Lutetium: A tiny amount of this rare element is added to gadolinium gallium garnet (a synthetic crystalline material) to alter its electrical properties. In the early days of computers, the result contributed to a method of recording data in bubble-like magnetic regions on the surface of a chip. For a look at this vintage computing method, read up on Intel 7110-1 bubble memory.
72. Hafnium is part of a compound that is employed as a gate insulator in some processors, such as Intel’s 45-nanometer processors. The Xbox 360 and PlayStation 3 Slim Edition feature different 45nm processors.
75. Rhenium: About 70 percent of the worldwide rhenium production goes to making jet-engine parts, due to its high melting point. Turbine blades for jet engines such as the Airbus A380 are made from rhenium.