Chemistry > Structure of Atom > 2.0 Cathode Ray Discharge Tube
Structure of Atom
1.0 Introduction
2.0 Cathode Ray Discharge Tube
3.0 Thomson Model of Atom
4.0 Rutherford Model of Atom
5.0 Atomic Number and Mass Number and It's Relation
6.0 Planck's Quantum Theory
7.0 Bohr’s Atomic Model
8.0 Dual Behaviour of Matter
9.0 Heisenberg Uncertainity Principle
10.0 Photoelectric Effect
11.0 Atomic Spectra
12.0 Quantum Mechanical Model of Atom
13.0 Quantum Number
14.0 Electronic Configuration of Elements
14.1 Aufbau (or building up) Principle
14.2 Pauli’s Exclusion Principle
14.3 Hund’s Rule
14.4 Stability of Completely Filled and Half Filled Subshells
2.2 Millikan’s Oil drop Experiment
14.2 Pauli’s Exclusion Principle
14.3 Hund’s Rule
14.4 Stability of Completely Filled and Half Filled Subshells
- Done by Robert Andrew Millikan
- Droplets of oil atomized in a chamber fall under the influence of gravity. If the oil droplet has an electric charge, its motion may be controlled by countering gravity with an electric attraction applied by an electric field. The combined motion can be analyzed by classical physics.
- Millikan demonstrated by these experiments that the charge of an oil drop is always an integral multiple of $1.6 \times {10^{ - 19}}$ C. This fact led to a neat explanation by attributing the charge of $1.6 \times {10^{ - 19}}$ C to the electron.
