These alkali metals are very, very reactive.

这些碱金属非常非常活泼。

And hydrogen is not considered an alkali metal.

氢不被认为是碱金属。

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

你有碱金属领带吗？ 这是我刚买的一条新领带。

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

第一组，如果你把氢在一边，这些被称为碱金属。

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

碱金属只想释离或阳离。

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属发生反应。

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属和碱土金属。

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猜想的确性用了数十年的时间，也因此建立了元素周期表——碱金属组了第一族。

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属，但该国首次发现锂矿藏将使印度在池制造方面实现自力更生。

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，它们同被称为碱金属。

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可以看到我们有碱金属（它们在哪里？）在这里。

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，你有碱土金属 - 活泼金属， 但不像碱金属那样活泼，带有两个荷而不是一个荷的阳离。

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——是碱金属。

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.

这里有稀有气体和氢，氢是宇宙万物的组部分，而中间是碱金属、金和其他可爱的规则金属。