主题:元素名称的来历-SI单位制

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nick22jp
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元素名称的来历
1. from anciently-used name

    copper---from Cyprus, where the metal was once mined.

    gold--from the Old English word meaning "yellow".

2. from its characteristic property

    chlorine--for the Greek word meaning "yellow-green".

3. from poets

    vanadium---named after Vanadis, the Scandinavian goddess of beauty.

4. named in honor of people or places

    americium (Am 95)--- America

    californium (Cf 98)---California

    berkelium (Bk 97)---Berkely

      einsteinium (Es 99)---Einstein

5. temporary name

    element 109: unnilennium---(un-1, nil-0, enn-9)



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九头鸟老皮
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quote]原文由 nick22jp 发表:
SI prefixes
Factor        Prefix      Symbol     

10^9          giga        G

10^6        mega      M

10^3        kilo          k

10^-1        deci        d

10^-2        centi        c

10^-3        milli        m

10^-6        micro      u(Greek mu)

10^-9        nano      n

10^-12      pico        p


SI is from the French, Systeme International.
nick22jp
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气体分类

Monatomic gases:
helium, neon

Diatomic gases:
oxygen, nitrogen, fluorine, chlorine, carbon monoxide

Triatiomic gases:

hydrogen sulfide, carbon dioxide, sulfur dioxide

Tetraatomic gases:
ammonia
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阴离子的名称
1.some common monatomic and diatomic anions:

Group V: nitride, phosphide, cycanide
Group VI: oxide, sulfide, hydroxide
Group VII: fluoride, chloride, bromide, iodide

2. polyatmoic ions
ammonium
oxoanions: carbonate, nitrate, nitrite, sulfate



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