原子and 元素

原子係所有物質分到最細時o既份子, 分別有中子質子同電子, 其中質子帶正電荷, 電子帶負電荷, 中子則不帶電荷.

元素是由不同數量的原子組合而成, 按質子數量多少有不同性質, 例如氫是由一個質子及一個電子組成, 氫就是一種元素.

補充資料:
元素所含的電子及質子數量一定相同, 如果一種元素的電子數量多了或少了, 則稱為離子.
又元素中的中子數量也可以有不同, 稱為同位數.

Atoms are the basic building blocks of matter that make up everyday objects. A desk, the air, even you are made up of atoms!
There are 90 naturally occurring kinds of atoms. Scientists in labs have been able to make about 25 more.

element is a type of atom that is defined by its atomic number; that is, by the number of protons in its nucleus. The term is also used to refer to a pure chemical substance composed of atoms with the same number of protons.

so atoms and element are different.