英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

boron    音标拼音: [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.


请选择你想看的字典辞典：
单词字典翻译
boron查看　boron　在百度字典中的解释百度英翻中〔查看〕
boron查看　boron　在Google字典中的解释Google英翻中〔查看〕
boron查看　boron　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • 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 (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 Uses, Benefits, Dosage, Side Effects and Interactions - Dr. Axe
    Boron uses include boosting done density, balancing hormones and fighting diabetes, among others Learn about other benefits and the best food sources
  • 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 Facts, Symbol, Discovery, Properties, Common Uses - Chemistry Learner
    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
  • 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 Jump to main content





中文字典-英文字典  2005-2009