The atomic number of carbon is 6.

碳的原子序数是6。

The atomic number of hydrogen is 1.

氢的原子序数是1。

The atomic number of hydrogen is one.

氢的原子序数是1。

Each element has a unique atomic number.

每个元素都有唯一的原子序数。

The periodic table organizes elements by their atomic number.

元素周期表按原子序数排列元素。

The atomic number is one of the fundamental characteristics of an element.

原子序数是元素的基本特征之一。

The atomic number of an element determines its position in the periodic table.

元素的原子序数决定了它在周期表中的位置。

The element with the atomic number 20 is called calcium, which ends with -ium.

原子序数为20的元素叫做钙，它以-ium结尾。

R is a reference referring to effective atomic number directly.

R是与有效原子序数直接相关的量.

Nitrogen: Gaseous chemical element, chemical symbol N, atomic number 7.

氮: 气态化学元素, 化学符号N, 原子序数7.