Atomic radius can be determined by_________________?
Correct answer: A. X - ray diffraction
- A. X - ray diffraction
- B. Spectrophotometer
- C. Optical microscope
- D. Electron microscope
Explanation
X-ray diffraction measures the regular spacing of atoms in a crystal, and these spacings can be used to determine atomic or ionic radii. Optical and electron microscopes do not normally provide the required direct crystal-lattice measurement for this purpose. Students may choose an electron microscope because it has high magnification, confusing magnification with diffraction analysis.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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