Unit 5 Test Scientists Flashcards
Bohr
Created the model for hydrogen
Bohr’s model worked for hydrogen, but…
The model could not be used on other elements (with more than one electron)
Could not explain the emission spectra of multi-electron atoms
The idea that the electrons orbited the nucleus was wrong
New approach after Bohr’s model was found as flawed
Quantum mechanics (for multi-electron atoms)
Louis Victor de Broglie
Suggested that all matter could be described as having wave-like properties
Instead of a circular orbit, he thought that the electrons moved in a wave around the nucleus but each wave was a different size & not circular
What equation did de Broglie develop
An equation that measures wavelength
λ = (h/mv)
Who discovered the wave function & what does it mean?
The wave function is basically an orbital
De Broglie
Heisenberg’s Uncertainty Principle
It is impossible to know both the position and energy of an electron in an atom simultaneously - measuring one alters the other
What did Erwin Schrödinger discover
The quantum mechanical model of the atom
Schrödinger’s equation can only be used for an exact answer for which element?
Hydrogen
The first scientist to describe light as little packets called quanta
Planck
Who views electrons in true orbits around the nucleus
Bohr
Who said that light was made up of particles called photons and that all electromagnetic radiation is quantizes
Einstein
