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- A substance which is not normally found in a living thing.
- xenon. Xe.
- Element 54, a colorless, inert gas used to fill cathode ray tubes.
- A very high energy form of electromagnetic radiation (though not as high energy as gamma rays). X-rays typically have wavelengths from a few picometers up to 20 nanometers. X-rays easily penetrate soft tissue, which makes them useful in medical imaging and in radiation therapy.
- x-ray crystallography.
- Determination of three dimensional arrangement of atoms in a crystal by analysis of x-ray diffraction patterns.
- x-ray diffraction pattern.
- Interference patterns created by x-rays as they pass through a solid material. Studying x-ray diffraction patterns gives detailed information on the three-dimensional structure of crystals, surfaces, and atoms.
- x-ray spectrum. x-ray spectra.
- A set of characteristic x-ray frequencies or wavelengths produced by a substance used as a target in an x-ray tube. Each element has a characteristic x-ray spectrum, and there is a strong correlation between atomic number and the frequencies of certain lines in the x-ray spectrum.
- x-ray tube.
- A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays.