Note:
Pinyin#Pinyin tone marking

Atom
A drawing of a Lithium atom. In the middle is the nucleus, which in this case has four neutrons (blue) and three protons (red). Orbiting it are its three electrons.
Lithium atom model
Showing nucleus with four neutrons (blue),
three protons (red) and,
orbited by three electrons (black).
Classification
Smallest recognized division of a chemical element
Properties
Mass: 1.66 x 10(−27) to 4.52 x 10(−25) kg
Electric charge: zero

An atom is the basic unit that makes up all matter.

yuarnzii shih yiqieh wuhzhih d jibeen danweih.


There are many different types of atoms, each with its own name, mass and size.

yuarnzii yoou heenduo zhoong, geh yoou mirngcheng, zhihliahng her dahxiaao.


These different types of atoms are called chemical elements.

zhehxie butorng d yuarnzii jiaohzuoh huahxuer yuarnsuh.


The chemical elements are organized on the periodic table, such as hydrogen and gold.

huahxuer yuarnsuh biaao liehchu geh'g huahxuer yuarnsuh, rur qingqih her jin.


Atoms are very small, but the exact size changes depending on the element.

yuarnzii heen xiaao, err meeigeh yuarnzii d dahxiaao dou bu yiyahng.


Atoms range from 0.1 to 0.5 nanometers in width.

yuarzii d kuanduh 0.1 zhih 0.5 nanometer.


One nanometer is around 100,000 times smaller than the width of a human hair.

1 nanometer dahyue shih 10,0000 fenzhi 1-tiaor tourfah d kuanduh.


This makes atoms impossible to see without special tools.

meiryoou tehshu shehbeih bu keenerng kahndaoh yuarnzii.


Equations must be used to see the way they work and how they interact with other atoms.

yuarnzii yuu qirta yuarnzii d huahxuer faanyihng yaoh yohng fangcherngshih biaaoshih.