An excited state of anatom,ion,or molecule,that hasa relativelylong lifetime before reverting to the groundstate. Metastable species are intermediates insome reactions.处于激发态的原子、离子或分子,在转变为基态前有相对长的寿命。在某些反应中,亚稳态物种是中间产物...[继续阅读]

    The spectrum ofthe hydrogen atom is characterized by severalseries of sharp spectral lines described bysimple laws. The general law for these seriesof lines is :氢原子光谱可以通过用简单定律来描述的几条尖锐的光谱线来表达。这些谱线遵循的一般定律是:1/λ=R(1/n12-...[继续阅读]

    A unit of pressure equal to onemmHg.In SI units it is equal to 133.322pascals. It was named for Italian physicist E-vangelista Torricelli (1609—47)压力的一种单位,相当于1毫米汞柱。在SI单位制中相当于133.322 Pa。用意大利物理学家E-vangelista Torricelli(1609—1647)的名字...[继续阅读]

    See cyanoferrate参阅167页cyanoferrate。...[继续阅读]

    See tin参阅582页tin。...[继续阅读]

    A half cell used formeasuring electrode potentials. The hydrogenelectrode (standard hydrogen half cell) is thebasic standard but,in practice,calomel elec-trodes are usually used用来测量电极电势的半电池。氢电极(标准的氢半电池)是基本的标准电池,但是实际上,甘汞电池常...[继续阅读]

    A type of battery used invehicles. It has two sets of plates: spongylead plates connected in series to the negativeterminal,and lead(Ⅳ) oxide plates connect-ed to the positive terminal. The material ofthe electrodes is held in a hard lead-alloygrid. The p...[继续阅读]

    The temperature at which aliquid is in equilibrium with its solid phase atstandard pressure and below which the liquidfreezes or solidifies. This temperature is al-ways the same for a particular pure liquidand is numerically equal to the melting pointof t...[继续阅读]

    See clathrate参阅140页clathrate。...[继续阅读]

    See aluminum ethano-ate.参阅23页aluminum ethanoate。...[继续阅读]