Examlex
Which of the following is NOT a video file extension?
Antimony
A brittle, lustrous gray metalloid used in alloys, flame retardants, and electronics, represented by the symbol Sb and atomic number 51.
Silicon
A chemical element with symbol Si and atomic number 14, known for its semiconductor properties in electronics.
Metals
Elements that are typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity.
Iron
A durable and abundant metallic element, symbol Fe, atomic number 26, used extensively as a component in steel and various other alloys.
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