Question

important questions of structure of the atom
class 9th​

Answer 1

Postulates of all chemists given in TB.

Valency of certain elements.

It is very important to read each and every word in the the lesson and understand to score high marks in chemistry.-experienced.

Answer 2

All ncert Q's and in text Q's are imp.

But the models and their down backs are also v imp.

Hope it may helps u ....

Plz mark it as a brainlist ans.....