Electrons and Wave-Particle Duality

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Spectroscopic analysis of the hydrogen spectrum…

Slide 12

Flame Tests

strontium

sodium

lithium

potassium

copper

Many elements give off characteristic light which can be used to help identify them.

Slide 13

Exclusion Notice

The contents of the next two slides reference equations that are no longer included on the AP Chemistry equations sheet, and can no longer be tested in a quantitative sense

Slide 14

Electron Energy in Hydrogen

***Equation works only for atoms or ions with 1 electron (H, He+, Li2+, etc).

Z = nuclear charge (atomic number)

n = energy level

Slide 15

Calculating Energy Change, E, for Electron Transitions

Energy must be absorbed from a photon (+E) to move an electron away from the nucleus

Energy (a photon) must be given off (-E) when an electron moves toward the nucleus