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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 - Uses, Side Effects, and More - 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, chemical element that is a semimetal essential to plant growth and of wide industrial application Typical effects of long-term boron deficiency are stunted, misshapen growth; vegetable ‘brown heart’ and sugar beet ‘dry rot’ are among the disorders due to boron deficiency
  • Boron - Health Professional Fact Sheet - Office of Dietary Supplements
    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]
  • Boron - Element information, properties and uses | Periodic Table
    Element Boron (B), Group 13, Atomic Number 5, p-block, Mass 10 81 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Boron Facts, Symbol, Discovery, Properties, Common Uses
    Boron supplements are used as medicines to treat painful menstruation, osteoarthritis and rheumatoid arthritis, depression, building strong muscles and bones, increasing sex hormone testosterone levels It benefits the body by increasing estrogen levels in post-menopausal women and healthy men
  • Borons Chemical and Physical Properties - ThoughtCo
    Boron has a high melting point of 2079°C and can conduct electricity at high temperatures Boron is used in glass production and is part of strong Neodymium magnets and semiconductors
  • Boron: The Element That Shapes Our World - Living Periodic Table
    Boron may not be a household name, like gold, but its influence is all around us From the food we eat to the technology in our pockets and the glass in our kitchens, this element touches many aspects of our daily lives





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