英语翻译
elements are substances made up of only one kind of atom.atoms of an element all contain the same number of protons.elements can be classified according to the particles they are made up frpm.elements can be classified by there state (or phase )at room temperature.the state means whether the element is a solid.liquid or gas.
substances which contain different elements are either mixtures or compounds.
最好不要用翻译器.（现在我馍有财富值了.赚够多少一定全部抛出感谢）
话是这样讲 可我晕了。书上说element 是由一种atom组成的 然后有的atom连接在一起成为了molecule 就是说 element是由一种atom 或者molecule组成的吗？那像air和nitrigen dioxide那些东西 是不是不是mixture就是compound?