Atomic orbitals
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Atomic Orbitals. The Bohr Model ( Niels Bohr). In 1913, Niels Bohr came up with a new model (Bohr was a student of Rutherford).

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Atomic Orbitals

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Atomic orbitals

Atomic Orbitals


The bohr model niels bohr

The Bohr Model (Niels Bohr)

In 1913, Niels Bohr came up with a new model (Bohr was a student of Rutherford)

He noticed that light given out when atoms were heated always had specific amounts of energy, so Niels Bohr proposed a model that electrons in an atom must be orbiting the nucleus and can reside only in fixed energy levels


Energy levels

Energy Levels

  • Each of the electrons in Bohr’s model has a fixed amount of energy called energy levels

  • This is similar to steps of a ladder (can climb up the ladder, but cannot step in between the steps)

  • Quantum is the amount of energy required to move an electron from one energy level to another

  • The further away from the nucleus, the more energy the electron has


The quantum mechanics model erwin schrodinger

The Quantum Mechanics Model (Erwin Schrodinger)

  • While Rutherford’s model described the path the electron moves, Erwin Schrodinger solved mathematical equations to describe the behavior of electron

  • Similar to Bohr’s model, Schrodinger describes the energy of electrons with certain values but does not involve an exact path the electron takes around the nucleus


The quantum mechanics view of the atom schrodinger

The Quantum Mechanics View of the Atom (Schrodinger)

The quantum mechanical model does not describe the exact path an electron takes around the nucleus, but determines the probability of finding an electron in a certain area


Quantum mechanical model

Quantum Mechanical Model

  • In this model, electrons move similar to a rotating propeller blade

  • You cannot tell its precise location at any instant because it’s a blurry region, but you have information regarding the probability of finding an electron within a certain volume of space

  • Similar to a fuzzy cloud…the probability of finding an electron is higher where the cloud is more dense


Atomic orbitals1

Atomic Orbitals

A region of space where electrons are likely to be located.

Each energy level can be made up of sublevels, which is made of different orbitals


Orbitals the periodic table

Orbitals & the Periodic Table


Atomic orbital theory

Atomic Orbital Theory


S orbital

S Orbital


Draw an s orbital

Draw an s orbital.

Now draw a 2s orbital. How are they different?


P orbital

P Orbital


Draw three p orbitals

Draw three p orbitals.

Now, draw all three p orbitals on an x-y-z axis


D orbitals

D Orbitals


F orbitals

F Orbitals


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