Question

tell physical properties of boron

Answer 1

 The Physical properties of Boron are the characteristics that can be observed without changing the substance into another substance. Physical properties are usually those that can be observed using our senses such as color, luster, freezing point, boiling point, melting point, density, hardness and odor. Boron is allotropic and exists as a powder or a metal-like substance. Its color ranges from a dark brown to black powder or a jet-black to silver-gray metal-like element. Its crystalline form is very hard, lustrous, but brittle. All forms of boron have very high melting points. Boron is a good electrical conductor at high temperatures and a poor conductor at low temperatures.


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Answer 2

non metallic element
exists in 3 allotropic element
extremely hard substance
non fusible under ordinary pressure
non conductor of electricity