The Science of Fireworks at the Franklin Institute

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B) Bohr Model of Atom

1:15 Bohr Model

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Early 1900's - Danish scientist Neils Bohr
discovers the strange behavior of electrons.

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Electrons in atoms
are restricted in the energies they can possess,
give off and absorb.

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Hypothetical Element X

Excited Electron

Energy of 12 eV

Excited Electron

Energy of 4 eV

Ground State

Energy of 1 eV

When electron falls back to ground state, what energies
is it capable of giving off?

Answer

8 eV, 3 eV, 11 eV

(the difference between
each possible energy level)

1 eV = 1.6 x 10^-19 J
p. 1 Reference

Each energy transition produces only
one photon