1. Atomic Theory Timeline Song
Words by Christy Johannesson
To the tune of the “Alphabet Song”

2. Verse 1 Dalton’s model was the “Billiard Ball” Atoms are indivisible
Thomson used the Cathode Ray
Electrons are charged in a negative way
His model was “Plum Pudding”
Or a chocolate chip cookie

3. Verse 2 Becquerel found by accident Radiation from an atom went
Oil drops were used by Millikan
To find the mass and charge of an electron
While they changed the models none
They paved the way for others to come

4. Verse 3 Rutherford experimented with Gold Foil
To find the nucleus he did toil
Its positive charge and tiny size
Showed that he was rather wise
Electrons moving ‘round the nucleus
Describes the “Nuclear Model” for us

5. Verse 4 Bohr said electrons move in orbits round
In energy levels they can be found
This explains the reason behind
The bright-line spectrum that we find
“Planetary Model” it was called
But Bohr knew that it was flawed

6. Verse 5 The orbital proposed by Schrödinger
Described most likely where electrons were
Quantum mechanics was the new game
“Electron Cloud” was the model’s name
Finally Chadwick found the neutron
But atomic theory still moves on