Question

i want a quick revision of chemistry 1st four chpters plz i have a test

Answer 1

Anything that occupies space and has mass is matter. Matter is made up of small particles..

Early Attempts :) five basic elements Air, water, sky, earth and fire. ( panch tatv-atom (kana)

Now. In modern times it is classified in physical and chemical properties..
1) physical - shape, size, colour, and texture
2)chemical- reaction with air, water, acids..


That's it..... I am also reading in class 9th