Chemistry Video Notes
Chem Notes
Structure of
an Atom
Class 11ᵗʰ
, ATOM Didn’t understand? Watch
the video (Click Here)
The word 'atom' has been derived from the Greek word 'a-tomio' which means
'uncut-able' or 'non-divisible'. Atom was discovered by John Dalton. He proposed
the famous atomic theory in 1807. Atoms are fundamental unit of matter. The
existence of different kind of matter is the due to the different atoms constructing
them
Atomic Theory KEEP IN MIND:-
1808- JOHN DALTON
All matter is made up of atoms. 1897- THOMSON MODEL
Atoms of an element are identical 1911- RUTHERFORD MODEL
Each element has different atoms 1912- BOHR MODEL
Atoms can engaged in a chemical reaction
Atoms are in divisible
Atoms and neither be created nor be destroyed
Structure of an Atom
The arrangement of electrons and
protons in an atom many scientist to
proposed various atomic models.
Didn’t understand? Watch
Discovery of Electron the video (Click Here)
In mid 1850s, many scientist mainly FARADAY begin to study electrical discharge in
partially evacuated tubes known as a cathode ray discharge tube. A cathode Ray tubes is
made up of Glass containing two thin pieces of metal called electrodes, sealed in it. The
electrical discharge through the gases could be observed only at very low pressure and at
very high voltage. The pressure of different gases the could be adjusted by evacuation of the
glass tubes. When a sufficiently High Voltage is applied around the electrodes, current starts
flowing through a stream of a particles a moving in the tube from the negative electrons to
the positive electrons. These were called cathode rays
Properties of cathode rays
The cathode rays starts from cathode and move towards
the Anode.
These rays themselves are not visible but these behaviour
can be obtained with the help of a certain kind of
materials which glow when it hit by them.
In the absence of a electrical or magnetic field these days
travel in straight line.
In the presence of electrical or magnetic field the behaviour CATHODE RAY TUBE
of cathode ray are similar to that expected from negatively LCD & LED TV
charged particles, suggesting that the cathode ray consist
of negatively charged particles called electrons.
Chem Notes
Structure of
an Atom
Class 11ᵗʰ
, ATOM Didn’t understand? Watch
the video (Click Here)
The word 'atom' has been derived from the Greek word 'a-tomio' which means
'uncut-able' or 'non-divisible'. Atom was discovered by John Dalton. He proposed
the famous atomic theory in 1807. Atoms are fundamental unit of matter. The
existence of different kind of matter is the due to the different atoms constructing
them
Atomic Theory KEEP IN MIND:-
1808- JOHN DALTON
All matter is made up of atoms. 1897- THOMSON MODEL
Atoms of an element are identical 1911- RUTHERFORD MODEL
Each element has different atoms 1912- BOHR MODEL
Atoms can engaged in a chemical reaction
Atoms are in divisible
Atoms and neither be created nor be destroyed
Structure of an Atom
The arrangement of electrons and
protons in an atom many scientist to
proposed various atomic models.
Didn’t understand? Watch
Discovery of Electron the video (Click Here)
In mid 1850s, many scientist mainly FARADAY begin to study electrical discharge in
partially evacuated tubes known as a cathode ray discharge tube. A cathode Ray tubes is
made up of Glass containing two thin pieces of metal called electrodes, sealed in it. The
electrical discharge through the gases could be observed only at very low pressure and at
very high voltage. The pressure of different gases the could be adjusted by evacuation of the
glass tubes. When a sufficiently High Voltage is applied around the electrodes, current starts
flowing through a stream of a particles a moving in the tube from the negative electrons to
the positive electrons. These were called cathode rays
Properties of cathode rays
The cathode rays starts from cathode and move towards
the Anode.
These rays themselves are not visible but these behaviour
can be obtained with the help of a certain kind of
materials which glow when it hit by them.
In the absence of a electrical or magnetic field these days
travel in straight line.
In the presence of electrical or magnetic field the behaviour CATHODE RAY TUBE
of cathode ray are similar to that expected from negatively LCD & LED TV
charged particles, suggesting that the cathode ray consist
of negatively charged particles called electrons.
