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boron    音標拼音: [b'ɔr,ɑn]
n. 硼

硼

boron
n 1: a trivalent metalloid element; occurs both in a hard black
crystal and in the form of a yellow or brown powder [synonym:
{boron}, {B}, {atomic number 5}]

Boron \Bo"ron\ (b[=o]"r[o^]n), n. [See {Borax}.] (Chem.)
A nonmetallic element occurring abundantly in borax. It is
reduced with difficulty to the free state, when it can be
obtained in several different forms; viz., as a substance of
a deep olive color, in a semimetallic form, and in colorless
quadratic crystals similar to the diamond in hardness and
other properties. It occurs in nature also in boracite,
datolite, tourmaline, and some other minerals. Atomic number
5. Atomic weight 10.81. Symbol B.
[1913 Webster]

boron
Symbol: B
Atomic number: 5
Atomic weight: 10.811
An element of group 13 of the periodic table. There are two allotropes,
amorphous boron is a brown power, but metallic boron is black. The
metallic form is hard (9.3 on Mohs' scale) and a bad conductor in room
temperatures. It is never found free in nature. Boron-10 is used in
nuclear reactor control rods and shields. It was discovered in 1808 by
Sir
Humphry Davy and by J.L. Gay-Lussac and L.J. Thenard.

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  • Boron - Wikipedia
    Boron is a chemical element; it has symbol B and atomic number 5 In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder
  • BORON: Overview, Uses, Side Effects, Precautions . . . - WebMD
    Learn more about BORON uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain BORON
  • 13 Surprising Benefits of Boron - Organic Facts
    Boron is a biological trace mineral that has been studied for its many health benefits if consumed in the daily diet Health conditions such as arthritis and osteoporosis can be managed with medications prescribed by a doctor but more importantly with a diet that includes boron
  • Boron | Properties, Uses, Facts | Britannica
    boron (B), chemical element, semimetal of main Group 13 (IIIa, or boron group) of the periodic table, essential to plant growth and of wide industrial application Pure crystalline boron is a black, lustrous semiconductor; i e , it conducts electricity like a metal at high temperatures and is almost an insulator at low temperatures
  • Boron Health Benefits and Uses - Verywell Health
    Boron is a naturally occurring element found in foods and available as a supplement It's thought to have benefits such as improving athletic performance, boosting bone health, preventing cancer, treating yeast infections, and reducing symptoms of osteoarthritis However, evidence for the benefits of boron is either mixed or limited
  • Boron - Health Professional Fact Sheet
    Boron is a trace element that is naturally present in many foods and available as a dietary supplement It is a structural component of plant cell walls and is required for plant growth, pollination, and seed formation [1]





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