This ppt is total about automic structure and isotopes with isobars . hope it will cleare all your concepts related to ATOM

2. ELECTRON –
negative, mass
nearly nothing
PROTON – positive,
same mass as
neutron (“1”)
NEUTRON –
neutral, same mass
as proton (“1”)
The Ancient Greeks used to believe that everything was made
up of very small particles. I did some experiments in 1808 that
proved this and called these particles ATOMS:
Dalton

3. A diagram showing the location of each part
of the atom.

4. A diagram showing the location of each part
of the atom.

5. Diagram of an Atom

6. diagram showing the charges of each part
of the atom.

7. Describe Neutron
Neutrons are uncharged particles found in the atomic
nucleus. Neutrons were discovered by James
Chadwick in 1932.
Experiments done in the late 1960's and early 1970's
showed that neutrons are made from other particles
called quarks. Neutrons are made from one 'up' quark
and two 'down' quarks.

8. Describe Proton
Protons are positively charged particles found in the
atomic nucleus. Protons were discovered by Ernest
Rutherford..
Experiments done in the late 1960's and early 1970's
showed that protons are made from other particles
called quarks. Protons are made from two 'up' quarks
and one 'down' quark.

9. Describe Isotope
Atoms that have the same number
of protons but different numbers
of neutrons

10. Describe Isotope
Example:

11. Mass and atomic number
Particle Relative Mass Relative Charge
Proton 1 1
Neutron 1 0
Electron 0 -1
MASS NUMBER = number of protons + number
of neutrons
SYMBOL
PROTON NUMBER = number of protons
(obviously)

12. presented by :-
Purushottam
Barde(Roll no. 122)