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

你有碱金属领带？是我刚买到的新领带。

And the alkali metals are very reactive.

碱金属非常活泼。

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

第，果你把氢排除在外，些元素被称为碱金属。

And hydrogen is not considered an alkali metal.

氢不被认为是碱金属。

Let's go way to the other side with the alkali metals.

让我们从碱金属的角度去探讨下。

These right over here are the alkali.

些就是碱金属。

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

碱金属只想释放电子并形成正离子或阳离子。

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。

These alkali metals are very, very reactive.

些碱金属非常非常活泼。

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

对它们来说，反应性没有碱金属那么强。

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

事实上，它们特别喜欢与些碱金属发生反应。

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——碱金属组成了第。

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电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.

个是荷兰的。 我星期六收到的。所以里你以看到我们有碱金属（它们在哪里？ ）在里。

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，形成带有两个正电荷而不是个正电荷的阳离子。

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.

看看元素周期表，那些非常想给出电子的元素——我们之前已经讨论过点了——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.

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

So we are going to go outside now, go get some even bigger reactions, with the alkali metals. This is a dog bowl which is stoneware, it is very hard, not likely to break, unless I drop it on my toes.

所以我们现在要出去，做些更大规模的碱金属反应。是个狗碗，是石质陶器，非常坚固，不容易碎，除非我把它掉到我的脚上。