Which one of the following is FCC?
Correct answer: D. All of these
- A. Zn
- B. Cadmium
- C. Magnesium
- D. All of these
Explanation
The face-centred cubic (FCC) structure is a type of crystal structure where atoms are located at each of the corners and the centres of all the cube faces of the unit cell. Common metals with an FCC structure include copper, aluminium, and nickel. However, Zinc, Cadmium, and Magnesium all crystallise in a hexagonal close-packed (HCP) structure, meaning none of them is FCC. Thus, the correct answer is 'All of these', as none of the options represent an FCC structure.
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About Physics of Solids
Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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