QUANTUM MECHANICAL MODEL

The Quantum Mechanical Model of the Atom


Energy Is Quantized

After Max Planck determined that energy is released and absorbed by atoms in certain fixed amounts known as quanta, Albert Einstein took his work a step further, determining that radiant energy is also quantized—he called the discrete energy packets photons. Einstein’s theory was that electromagnetic radiation (light, for example) has characteristics of both a wave and a stream of particles.

The Realm of Quantum Mechanics



The theory of quantum mechanics explains the behavior of particles in the atomic and subatomic realms. These particles include photons (particles of light) and electrons. Since the electrons of an atom determine many of its chemical and physical properties, quantum mechanics is foundational to understanding chemistry.




The Quantum-Mechanical Model of the Atom
The most common way to describe electrons in atoms according to quantum mechanics is to solve the Schrödinger equation for the energy states of the electrons within the atom. When the electron is in these states, its energy is well-defined but its position is not. The position of an electron is described by a probability distribution map called an orbital.
The solutions to the Schrödinger equation (including the energies and orbitals) are characterized by three quantum numbers: n, l, and ml. The principal quantum number (n) determines the energy of the electron and the size of the orbital; the angular momentum quantum number (l) determines the shape of the orbital; and the magnetic quantum number (ml) determines the orientation of the orbital.

Scientist Developed the quantum mechanical model of the atom?


Erwin Schrodinger

Born : 12 August 1887(1887-08-12)

Died : 4 January 1961 (aged 73)

Citizenship : Austria, Germany, Ireland

Nationality: Austria

Known for..
Schrödinger equation
Schrödinger's cat

Schrödinger method

Schrödinger functional

Schrödinger picture

Schrödinger-Newton equations

Schrödinger field

Rayleigh-Schrödinger perturbation

Schrödinger logics

Cat state

Notable awards : Nobel Prize in Physics (1933


Neils Bohr

Born:  7 October 1885(1885-10-07)

Died: 18 November 1962 (aged 77)

Nationality: Denmark

Known for:
Copenhagen interpretation


Complementarity

Bohr model

Sommerfeld–Bohr theory

BKS theory

Bohr-Einstein debates

Bohr magneton