Atomic structure Contact 9731713568 to download

1. MASS
VOLUME
OCCUPIE SPACE
MATTER

2. MATTER
ATOM

3. In the early nineteenth century, an English
chemist Dalton stated clearly his ideas
regarding atoms. He was the first person to
give out atomic theory in 1803. This theory
is known as Dalton's Atomic Theory.

6. DALTON'S ATOMIC THEORY
1. Elements are made up of tiny particles called
“atoms”.
2. Atoms are indivisible.
3. Atoms can neither be created nor destroyed.
4. Atoms of the same element are alike in their
mass and chemical properties.

7. DALTON'S ATOMIC THEORY [Con.]
5. Atoms of different element differ in their mass and
chemical properties.
6. Atoms of one element cannot be converted into atoms of
another element
7. Atoms of different elements always combine in simple,
definite and integral ratios to form compound atoms.

8. According to Dalton atom is the smallest, indivisible particle of
an element that takes part in a chemical reaction.

9. 1. According to Dalton ,what is an atom ?
2. What are the properties of an atom according to Dalton ?
3. What are the postulates of Dalton's atomic theory ?

10. MATTER
ATOM
PROTON ELECTRON NEUTRON

11. 10000V
0.01atm
Can electricity pass
through gas

12. 10000V
0.01atm
CATHODE
Cathode Ray Experiment
J J Thomson
Discovery of negatively charged particle - Electron

13. Cathode rays: properties

14. 10000V
0.01atm
Cathode rays travel in straight line.

15. 10000V
0.01atm
Pedle
These rays consist of material particles.

16. 10000V
0.01atm
Cathode rays originate from cathode

17. 10000V
0.01atm
CATHODE
Cathode rays are deflected by electric field.

18. 10000V
0.01atm
CATHODE
Cathode rays consist negatively charged particles called "electron".

19. 1) Cathode rays originate from cathode.
2) Cathode rays travel in straight line.
3) Cathode rays are deflected by electric field.
4) Cathode rays are deflected by magnetic field.
5) These rays consist of material particles.
6) Cathode rays consist negatively charged particles called "electron".

20. 11000V
0.01atm
Eugene Goldstein
Anode Ray Experiment
Discovery of Positively charged particle - Proton

21. 11000V
0.01atm
Eugene Goldstein
AnodeRay Experiment