Cobalt is a metallic element, atomic number 27 in the period table.

钴是金属元素，序数是27。

An element's atomic number is the number of protons in its nucleus.

一种元素序数是其核质数。

There are 118 known elements, each organized by atomic number.

有118种已知元素，每种元素都是按序数排列。

Bingo. Atomic number 61, come on down.

有了 序列61 乖乖现了。

The periodic table is an organized display of all the chemical elements in order by atomic number.

元素周期表是所有化学元素按序数有序排列表。

Which of these elements, who's atomic number is six is one of the most abundant elements in the known universe?

这些元素，哪一个序数是六，是已知宇宙富元素之一？

With an atomic number of 11, which of these elements gets its symbol from the Latin word " natrium" ?

序数为11，下面哪个元素符号来自拉丁词“natrium”？

Unbeknownst to Mendeleev, he had correctly ordered the elements by atomic number — the number of protons in the atomic nucleus.

门捷列夫不知道是，他已经按照序数（核质数）正确地对元素进行了排序。

If you multiply that by the atomic number of " N" nitrogen, you get 14, which is the atomic number of...?

如果你乘以" N" (元素氮)数，就得到数14，也就是...?

The number of protons in an element is its atomic number.

元素质数就是它序数。

The atomic number is the soul of the atom. It's what makes it it.

序数是灵魂。 这就是它成功之处。

" Gold" gold is a yellow metal, atomic number 79 for the chemists out there.

“金”金是一种黄色金属，化学家认为它序数为 79。

The element whose atomic number is at Mercury is also called quicksilver.

序数为水星元素也称为水银。

If not, it's atomic number 47.

如果不是，它序数是 47。

" Gold" (gold) has the chemical symbol Au and the atomic number 79.

“金”（金）化学符号为Au，序数为79。

And the number of protons, this is defined as the atomic number.

和质数，这被定义为序数。

If you want to be technical, it has the atomic number 78 with the chemical symbol Pt.

如果你想成为技术人员，它序数为 78， 化学符号为 Pt。

As we move down into much heavier atomic numbers, we'll probably see more and more of these anomalies.

随着我们向下移动到更重序数，我们可能会看到越来越多这些异常现象。

We can describe how many protons and neutrons are in an atom’s nucleus using its atomic and mass numbers.

我们可以使用数和质量数来描述核有多少质和。

Chemists use it on x-ray defractometers because actually it is so lightweight it is actually got atomic number 4.

化学家在 X 射线衍射仪上使用它， 因为实际上它非常轻，序数为 4。