Examlex
Why is iodine considered a trace element, and what is its biological function in humans?
Geometric Pattern
A motif, design, or sequence that consists of shapes, lines, and figures following a specific repetitive arrangement.
Crystal Lattice
A symmetrical three-dimensional arrangement of atoms inside a crystal.
Halite
A salt mineral (NaCl) generally formed by the evaporation of water; cleaves into cubes and has a distinctive salty taste.
Tetrahedron
A four-sided pyramid, as in a silica tetrahedron.
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