It has one electron in its outermost shell.

它的最外层有一个电子。

Once again, it has one valence electron, one electron in its outermost shell.

同样，它有一个价电子，一个位于最外层的电子。

How many electrons does it have in its outermost shell?

它的最外层有多少个电子？

And valence electrons are electrons in the outermost shell they tend to coincide, although there's a slightly different variation.

价电子是最外层的电子，它们往往重合，尽管变化略有不同。

Once again its outermost shell is its fourth shell, is its fourth shell.

它的最外层壳又是它的第四壳，是它的第四壳。

They have filled their outermost shell.

他们已经填满了最外层的外壳。

They have very similar properties and that's because they have two valence electrons, two electrons in their outermost shell.

它们具有非常相似的特性，那是因为它们有两个价电子，两个电子位于最外层。

Well, in its second shell, its outermost shell, it has two plus two.

好吧，在它的第二个壳中，它的最外层壳中，它有 2 加 2。

The valence electrons, these are the electrons that are going to react, which tend to be the outermost shell electrons, but there are exceptions to that.

价电子，这些是将要发生反应的电子，它们往往是最外层的电子， 但也有例外。

That's because the elements in a column, or the elements in a group tend to have the same number of electrons in their outermost shell.

那是因为一列中的元素或一组中的元素往往在其最外层壳中具有相同数量的电子。

Each of the hydrogen's have one valence electron, and the oxygen has, we see here, at it's outermost shell, it has one, two, three, four, five, six valence electrons.

每个氢都有一个价电子，我们在这里看到，氧在它的最外层有一个、两个、三个、四个、五个、六个价电子。