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Francium is the densest of the Alkali Metals and also radioactive.

钫是密度最大的,具有放射性。

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Based on the characteristics of biomass fuel, this article summarizes the sources of alkali metals in biomass and the elutriation and migration.

摘要在明确了生物质燃料特点的基础上,对生物质元素的来源和析出迁移规律进行了概述。

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This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.

离子交换剂在萃取得到了广泛的应,本文详细总结了离子交换剂在分析化属、贵属、稀土元素、锕系元素等的分离与测定。

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Which indubitably indicate that the bismuthous sulfide can only dissolve in halogen acid except hydrofluoric acid, the mixed solution of dilute sulfuric acid and alkali halide.

结果表明硫化铋只能溶于氢卤酸(除氢氟酸外)、稀硫酸与卤化物的混合液,不能溶于稀硫酸

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When two different metals are placed in a fused alkali or alkaline-earth chloride bath, the more readily corrodible metal will deposit on the less corrodible one.

当两种不同的属放在熔融的属氯化物盐浴时,较易腐蚀的属会沉积在较难腐蚀的属上。

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It is studied further that the dissolubility of the bismuthous sulfide in the solutions of the non-oxidative strong acid through the experiment by means of chemical thermodynamics.

热力基础理论和方法研究了硫化铋在无氧化性强酸和可溶性卤化物溶液的溶解性。

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Abstract : When two different metals are placed in a fused alkali or alkaline-earth chloride bath, the more readily corrodible metal will deposit on the less corrodible one.

摘要 : 当两种不同的属放在熔融的属氯化物盐浴时,较易腐蚀的属会沉积在较难腐蚀的属上。

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汗学院:生物化学

These alkali metals are very, very reactive.

这些碱金非常非常活泼。

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汗学院:生物化学

And hydrogen is not considered an alkali metal.

不被认为是碱金

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趣味化学实验:Periodic Videos

You have an alkali metal tie? It's a new tie I just got.

你有碱金领带吗? 这是我刚买的一条新领带。

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Crash Course 综合篇

Alkali metals want nothing more than to dump off an electron and form a positive ion, or cation.

碱金只想释并形成正或阳

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汗学院:生物化学

Also for them, not as quite as reactive as the alkaline metals.

同样对他们来说,不如碱金那么活泼。

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汗学院:生物化学

Group one, if you put hydrogen aside, these are referred to as the alkali metals.

第一组,如果你在一边,这些被称为碱金

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Crash Course 综合篇

The first two columns on the left are your alkali metals, and your alkaline earth metals.

左边的前两列是碱金和碱土金

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汗学院:生物化学

In fact, they especially love to react with the alkali metals over here.

事实上,他们特别喜欢与这里的碱金发生反应。

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经济学人-科技

It took decades to tease out the truth of Debereiner's conjecture, and thus to construct the periodic table-in which the alkali metals form the first column.

科学家们证实Debereiner猜想的正确性用了数十年的时间,也因此建立了元素周期表——碱金组成了第一族。

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VOA常速英语_亚洲

India used to import the alkali metal from Australia and Argentina, but the first discovery of lithium deposits in the country will make India self-reliant in battery manufacturing.

印度过去常常从澳大利亚和阿根廷进口碱金,但该国首次发现锂矿藏将使印度在电池制造方面实现自力更生。

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经济学人-科技

ONE of the first inklings that chemistry has an underlying pattern was the discovery, early in the 19th century, of lithium, sodium and potassium-known collectively as the alkali metals.

早在19世纪,人们对化学潜在规律已有模糊认知之时,锂、钠、钾被发现,它们同被称为碱金

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趣味化学实验:Periodic Videos

This one's a Dutch one. I was given it on Saturday So here you can see we have the alkali metals (And where are they? ) Here.

这个是荷兰的。我是星期六收到的所以在这里你以看到我们有碱金(它们在哪里?)在这里。

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Crash Course 综合篇

Next, you have the alkaline earth metals - reactive metals, but not as reactive as the alkali metals, forming cations with two positive charges instead of just one.

接下来,你有碱土金 - 活泼金, 但不像碱金那样活泼,形成带有两个正电荷而不是一个正电荷的阳

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汗学院:生物化学

Well if you look at the period table, the people who want to give really badly-- and we've talked about this a good bit-- are the alkali metals.

好吧,如果你看一下周期表,那些非常想给予的人——我们已经谈了很多——是碱金

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Scishow 精选系列

You got your noble gases over here, and hydrogen, the building block of everything in the universe over here, you got your alkali metals and gold and other lovely regular metals in the middle here.

这里有稀有气体和是宇宙万物的组成部分,而中间是碱金、金和其他爱的规则金

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