Chapter 1: Particles, physics A(S)-level, aqa Exam Board. The notes include: atomic structure, stable and unstable nuclei, particles and antiparticles, forces and exchange particles, classification of particles and quarks
Chapters 9 & 10: Electric and Gravitational Fields, Capacitors
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Physics A-level
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PARTICLES
YSIHYRELEI-E.ge/sIY#if
Mass
C- 9.1×10-3
'
-1 1.6×10
"
-18^40
M 1.7×10-27 O O 1
P 1
""
1.7×10-27 1.6×10 1-
1
SPECIFIC (HARGE :
CHARGE OF A PARTICLE DIVIDED BY ITS MASS ( CHARGE -
To -
MASSRATIO )
(
( conlombs ) kg)
ó """°
" ""°"
{
[
" " ""
" Newtons
oe
-
O
nucleus 888
0%0 electronico
e-
o
00
Mass ctlarge in C
kg ;
=
RUTHERFORD EXPERIMENT :
1) MOST d- PARTICKS
go through with out
cnanging
trajectory .
> most of the atom is empty Space .
2) A FCW PARTICLES Cttangetrajectory
> * i. *. ".in.ae
;
* .
3) EVEN FEWER PARTICLES
( 10.000 )
, bounce back .
> >
Vlry Small & MASSIVE NUCLEUS .
> -1
>
✗
-
-
PARTICICS
> Detector
{ He
Hét
, SIMPLE MODEL OF THE ATOM
ATOMS :
→
PROTONS + Neutron in Nucleus
→ electrones araend
orbiting
ISOTOPES :
SAMC PROTAES ,
DIFFERENT NEUTRONS
PARTICLE PHYSICS :
the
strong force
NUCLEAR DISTANCES RANGE OF STRONG FORCE :
0.5 3 fm
'°
fm
"
SIZE OF AN ATOM 10 10 >
- -
= -
m -
SIZE OF A NUCLEUS = 10
- "
m
> BELOW O -5 fm :
VERY REPULSIVE FORCE
7 OVER 3 fm :
Force is ZERO
(OULOMB REPULSION Force
l ( LONG RANGE)
/
É
'
,
~ / Separaron
FORCE o |
RED -
-
Strong Force
¥
BETWEEN electrostática repulsión
NUCKONS
( N) ¿É /
|
NUCLEONSEDARATION
( 10 5m)
'
IOFÉ
-
1- Itm ,
µ«⇐¿µµµ[
-
/
STRONG Nuclear Force
( short range)
⑦ ATTRACTIVE
TYPICAL Nuclear separación = 1-3×10 - ''
m
↳ MORE Force
> STRONG ATTRACTIYE Force
=
O
=
104N
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