All the Tricks and Techniques you need to Understand Atomic Theories. Learn Dalton, Rutherford, JJ Thompson, Bohr and Waves Mechanic Atomic Theories.
- Background in Chemistry
- Posses basic English Skills
Who Is This Video For?
- Persons who wish to Love Chemistry
- Those Interested in Atomic Theories
- Students Preparing for School Examination
- Candidates preparing for Scholarships
- Jamb, Waec, GCE, NABTEB and Neco Candidates
Watch Atomic Theories
Atomic Theories Chemistry Topics
Dalton’s Atomic Theory
1. All Matter (Elements) Consists of
Small Indivisible Particles Called Atoms
2. Atoms of the same elements are similar in shape and mass and differ from the atoms of other Elements.
3. Atoms can neither be created nor destroyed.
4. When Atoms Combine, they do so in simple Ratio
5. All chemical reaction involves only the separation, combination or rearrangement of Atoms.
J.J Thompson’s Atomic Theory
This is also called the Plum-pudding Model. Thompson also discovered electrons in his Cathode Ray experiment. He proposed that an atom is a sphere of positively charged matter within which negative charges are embedded.
Rutherford’s Atomic Theory
- The Atom is made up of a positively charge nucleus which is centrally located.
- Electrons revolve around the necleus in much the same way as the planets move around the sun
- The mass of the atom is concentrated in the nucleus.
Bohr’s Atomic Model
- Electrons are only allowed to occupy specific spherical orbits around the nucleus
- The orbits or energy levels are designated by K,L,M,N..
- When electron is in its allowed orbit, it gives no radiation
- Electrons emit radiations when they are move from higher to lower energy level (Lines in hydrogen spectrum)
Wave Mechanics Model
01:42 – Atomic Theories
05:30 – Wave Mechanics Model
09:12 – Quantum Numbers
12:16 – Principal Quantum Numbers
14:38 – Azimuthal Quantum Number
18:33 – Magnetic Quantum Number
20:13 – Spin Quantum Number
25:54 – Names and Shapes of Orbitals