Atomic Timeline
This ancient Greek thinker first proposed that matter is made of indivisible particles called atoms. Which ancient Greek thinker was this?
Democritus
Who proposed wave-particle duality?
Louis de Broglie
What is Heisenberg's full name?
Werner Karl Heisenberg
Who discovered the neutron?
James Chadwick
What gas is the largest amount in Earth’s atmosphere?
Nitrogen
This scientist created an atomic theory stating that atoms are indivisible and identical within each element. Who was this?
John Dalton
Who developed the wave equation and introduced electron probability clouds?
Erwin Schrödinger
What year was Heisenberg born?
1901
Who conducted the first controlled nuclear reaction in Chicago?
Enrico Fermi
What force pulls objects toward the center of Earth?
Gravity
This experiment by Rutherford proved that the atom has a small, dense, positive nucleus. What was the experiment?
The Gold Foil Experiment
Heisenberg’s model showed electrons move in ___ instead of fixed paths. What did Heisenberg's model show about how electrons moved?
Heisenberg formulated this principle, stating you cannot know an electron’s exact position and momentum at the same time. What was this principal?
The Uncertainty Principle
Which two scientists split the uranium nucleus?
Otto Hahn and Fritz Strassmann
What part of the cell contains the DNA?
The Nucleus
This scientist created a model where electrons orbit in fixed energy levels. Who was this?
Niels Bohr
Heisenberg's atomic model helped fix problems in an earlier atomic model. What was this model?
Bohr's model
What modern technologies did Heisenberg's model help create?
Lasers and Computers
Which two scientists explained nuclear fission after the discovery?
Lise Meitner and Otto Frisch
What planet is known for having a giant storm called the Great Red Spot?
Jupiter
This scientist discovered the neutron in 1932. Who was this?
James Chadwick
One improvement of Heisenberg’s model: it helped scientists predict something about electrons. What did Heisenberg's model help predict?
The location of the electrons.
What is the process plants use to convert sunlight into energy?