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。

If we move one over to the right this group two right over here, these are called the alkaline earth metals.

如果我们把一个移到右边，这两个就在这里，它们被称为碱土金属。

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一个正电荷的阳离子。