About electron,nutron,proton

1. Elementary particle of
atom

3. ELECTRON
Electron is a sub atom particle
with a negative element.
Electric charge. A n electron
has no known components or
substructure. It is generally
though to be elementary
particle. An electron has a mass
that is approximately 1/1836
that of the proton. Its symbol is
e-

4. Proton
The proton is a sub
atomic particle with the
symbol P or P+ and a
positive electric charge of
1 elementary charge. One
or more protons are
present in atom . Every
proton number is called
atomic number. The
name of proton was
given to the hydrogen
nucleus by Earnest
Rutherford in1920.

5. Neutron
The neutron is sub atomic
particle .its symbol is n . It
has no charge. Its mean ,it
is neutral and a mass
slightly larger than that of
a proton .With exception
hydrogen -1 .Nucleic of
atoms consist of protons
and neutrons . Which are
there fore collectively
referred to as nucleons.

7. Atomic Number
In chemistry and physics , the
atomic number is the number
of protons founds in the
nucleus of an atom and
therefore identical to the to
the charge number of the
nucleus .It is conventionally
represented by symbol Z . The
atomic number uniquely
identifies a chemical element
.In the atom of neutral charge .
The atomic number is equal to
the number of electron.

8. Mass number
The mass number ‘ A’
which is the number
of nucleons .The total
number of protons
and neutrons in the
nucleus of atom.

9. Atomic mass
Relative atomic mass is a
dimensional physical
quantity. The ration of
the average mass of atoms
of element to 1/12 the
mass of an atom of
carbon 12 (known as the
unified mass unit)

13. Quantum Number: Any set of number
that together fully determine the sate of
quantum mechanical system by quantifying its
individual properties. For example four
quantum numbers are used to specify the
quantum state of an electron orbiting the
nucleus of atom .one characterizes its basic
orbital energy level one the shape of its orbit,
one the orientation of its orbit of its orbit
relative to other orbit and one its spin.