FACTS, USES AND LIMITATIONS OF ATOM

MODELS

COMPARISON

Electrons revolve around the nucleus like planets revolve aroundthe sun.

AMAZING FACTS

Nucleus is 10000 times smaller than atom!

Electron is 10000 times smaller than nucleus!

(From website www.northernlight.com)

VELOCITY OF ELECTRON

Velocity of electron in its first orbit is 2190km per sec Aaaaaaaaawwwwhh!

(Source taken from CBSE curriculum)

ELECTRON PRODUCTION

Electrons can be produced in lab by using induction coil,waste bulb and metallic conductor.

(Source taken from ‘Association of SCIENCE TEACHERS’ manual.)

APPLICATIONS

1.Atom model helps us to study about electrons, nucleus and nuclear particles.

2.It helps us to study about nuclear fission reaction whichis the basic principle of nuclear reactor by which we get tremendousamount of energy. 3. It helps us to study the reactions in the stars which are nuclearfusion basically.

LIMITATION

Rutherford atom model does not explain why electrons which revolve around the nucleus do not loose energy and finally fallinto the nucleus.

GRAPH

No. of alpha particles versus angle of scattering

No ofalphaparticles

Angle of scattering0 30 60 90

RESEARCH CALCULATION

Repulsive force of Hydrogen atom

Formula;f=2Ze*e r

Z=1e=1.6*10

On substituting we get f=5.12*10

-19

r=10-15

C

m

-23

Newtons.

DIFFERENT ATOM MODELS

Rutherford atom model gave rise to different atom models.They are;1.Bohr atom model2.Summerfield atom model.3.Vector atom model.4.Standard atom model.

THE LATEST ATOM MODEL

It is Standard atom model. But anyway the foundation was laid only by Sri Rutherford.

SO, LET US REMEMBER…….

Whenever we enjoy energy from a nuclear fission reactoror simply look around to see the universe……….

THE RUTHERFORD ATOM MODEL

THANK YOU

GE by STM