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- The alkali metal elements were determined by the non-flame atomization method on tradition flame atomic absoption spectrophotometer which was installed special prepared stainless steel atomizing tube. 在常规火焰原子吸收分光光度计上采用特制的不锈钢原子化管对碱金属元素进行无火焰原子化法测定,克服了碱金属元素在火焰中的电离效应,试液用量极少。
- Keywords vanadium pentoxide;cesium oxide;rubidium oxide;alkali metal element;low tempertaure activity;sulfuric acid;sulfur dioxide; 五氧化二钒;氧化铯;氧化铷;碱金属元素;低温活性;硫酸;二氧化硫;
- alkali metal elements 碱金属
- a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite. 一种软质的银白色或淡黄色碱金属元素，在空气中变黄，见于天青石和菱锶矿中。
- a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite. 一种软质的银色碱金属元素，能在空气中燃烧，能与水发生剧烈反应，见于光卤石、锂云母和铯榴石中。
- a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite 一种软质的银白色或淡黄色碱金属元素，在空气中变黄，见于天青石和菱锶矿中
- An alloy of two or more metallic elements. 合金两种或多种金属所合成的金属
- a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt). 银白色软质碱金属元素，以天然化合物形式大量存在，燃烧时发出黄色火焰，能与水发生强烈反应，见于海水和矿盐（岩盐）中。
- a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite. 轻而软的银白色碱金属元素，空气中能迅速氧化，能与水发生剧烈反应，以天然化合物状态大量存在于海水、光卤石、钾盐镁矾和钾盐中。
- a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite 轻而软的银白色碱金属元素，空气中能迅速氧化，能与水发生剧烈反应，以天然化合物状态大量存在于海水、光卤石、钾盐镁矾和钾盐中
- a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt) 银白色软质碱金属元素，以天然化合物形式大量存在，燃烧时发出黄色火焰，能与水发生强烈反应，见于海水和矿盐（岩盐）中
- Yes. Iron is one of the metal elements found in the Earth. 知道。铁是地球上的金属元素之一。
- The hydroxides of the alkali metals are strongly alkaline. 碱性金属的氢氧化物有很强的碱性。
- Francium is the densest of the Alkali Metals and also radioactive. 钫是碱金属中密度最大的,具有放射性。
- Yes. iron is one of the metal element find in the earth. 知道。铁是地球上的金属元素之一。
- There are about seventy metallic elements. 金属元素有七十种左右。
- Water, acrylonitrile and the galactomannan gum are added to a reactor with an alkali metal hydroxide. 水、丙烯晴和半乳甘露聚糖胶，同碱金属氢氧化物在一起，加入到反应器中。
- A carbonate or hydroxide of an alkali metal, the aqueous solution of which is bitter, slippery, caustic, and characteristically basic in reactions. 碱碱金属的碳酸盐或氢氧化物，其水解溶液味苦、滑腻、有腐蚀性且在反应中呈碱性
- All the alkali metals have a single s-electron outside a closed shell. 所有的碱金属都在闭合壳层之外有一单个S电子。
- Non-alkali cloth made form aluminum boron silicate glass contains less than 0.8% of alkali metal oxide. 无碱布采用铝硼硅酸盐玻璃成份，其碱金属氧化物含量不大于0.;8%25。
