3194310
Description
Atomic Structure
- Classical atomic model
- Dalton's atomic theory
- Dalton's model : solid sphere
- 1. Matter consists of tiny particles called atom.
- 2. Atoms of one element are identical in
mass.
- 3. Compounds are the combination of
atoms with a specific ratio.
- 4.Chemical reactions involve
reorganization of the atoms.
- Dalton's model : solid sphere
- Thomson's atomic model
- Raisin in the plum pudding
- Experiment with cathode
ray and conclude that
matters consist of
negatively charged particle
called electron.
- Calculate mass/charge ratio of electron = -5.686 * 10^12 kg/C
- Raisin in the plum pudding
- Rutherford's atomic model
- Suggest the atomic nuclear model from the results
of bombardment gold foil with alpha particles.
- Atom consists of electrons which move around the
positively charged center called nucleus.
- atomic planetary model
- Atom is mostly empty space. The size of nucleus is
very small compare to the atom itself.
- Suggest the atomic nuclear model from the results
of bombardment gold foil with alpha particles.
- Dalton's atomic theory
- Quantum View of Atom
- Bohr's model
- Bohr proposed that atom has energy
levels as circular orbits. Electrons move
as wave in a specific energy levels.
Electrons can transfer to different
energy levels when they lose or gain
energy.
- Each energy level has specific
quantum number (n) starts from
1,2,3...
- Bohr proposed that atom has energy
levels as circular orbits. Electrons move
as wave in a specific energy levels.
Electrons can transfer to different
energy levels when they lose or gain
energy.
- Erwin Schrödinger used Quantum Mechanics
to explain the energy state in the hydrogen
atom.
- The equation is called wave
function. A specific wave function is
often called an orbital.
- Quantum number and atomic orbitals
- the orbital angular momentum quantum
number (l)
- give different shape of orbital
- s p d f orbitals
- s p d f orbitals
- give different shape of orbital
- the magnetic quantum number (ml)
- give different orientation of orbital
- give different orientation of orbital
- the spin quantum number (ms)
- represent spin of electron. Only two possible values : +1/2 and -1/2
- represent spin of electron. Only two possible values : +1/2 and -1/2
- the orbital angular momentum quantum
number (l)
- Quantum number and atomic orbitals
- The equation is called wave
function. A specific wave function is
often called an orbital.
- Wave Particle Duality
- In subatomic level, energy and matter cannot be distinguished.
They have both light and particle properties.
- light consists of particles
called photon. Photon
travels as wave.
- Matter consists of
atom and subatomic
particles. Subatomic
particles such as
electrons travel or
move as wave.
- light consists of particles
called photon. Photon
travels as wave.
- In subatomic level, energy and matter cannot be distinguished.
They have both light and particle properties.
- Bohr's model
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