Unit 22.Atomic physics

04.15.2020
08:58:38
Dear students good morning
Today's topic : protons neutrons and electrons
Pg.no : 311 to 313
The important points are
1.atomic nucleus is made of two types of particles
* Protons - positive charge
* Neutrons - no charge
2. Around the nucleus electrons ( negative charge ) are revolved.
Look at table 22.1 - charges and masses of the three sub - atomic particles
3.refresh mass and atomic number of elements
No homework
For better understanding of concepts watch the below videos