what is particle model of matter and how does it work?

what is particle model of matter and how does it work?
what is particle model of matter and how does it work?

what is particle model of matter and how does it work?
You didn't ask this question with Chinese .So I want to ask you some questions.
***Are you Chinese?***
If not.
Why didn't you know how to spell the 9 planets of the solar system?
And why could you speak Chinese but now can't?