Summary Edexcel A Level Physics Student Book 2 - Unit 8 - Nuclear and Particle Physics

Nuclear
and


Particle

Physics

, 1 uber of protons
① Atom numbers and neutrons


↓
---
A : Nucleon number Cor mess number !

.
2 Proton number

X Element Symbol
- --


:




·
Isotope : This is a variation of an element with the same number of protons but

a different number of
neutrons .




② Atomic Models

Thompson Plan Pudding Model
·
Atom was made
up of
a
sphere of positive charge with small areas of
evenly distributed throughout like plums
negative charge in
plan pudding
.



positive

Charge




negative
Charge


plum pudding model