Democritus
What year did Democritus make his contribution to the atomic theory?
400 B.C.E
In what year did Dalton make his contribution to the atomic theory?
1803
In what year did Marie Curie make her contribution to the atomic theory?
1898
In what year did Thomson make his contribution to the atomic theory?
1932
In what year did Einstein make his contribution to the atomic theory?
1905
What does Democritus’s model show?
Look at packet for full question with model
A solid atom
What does Dalton’s model show?
Look at packet for full question with model.
Matter created by small particles called atoms
What does Marie’s model show?
Look at packet for full question with model
radioactive decay of an atom
What was the name of Thomson’s model?
Plum pudding model
What does Einstein’s contribtuion to the atomic theory show?
That all liquids contain atoms
What is Democritus‘s discovery concerning the atomic theory?
What did Dalton contribute to the atomic theory?
That all atoms in the same element have the same mass.
What did Marie’s theory prove?
That atoms were not solid and were subatomic particles
What did Thomson discover?
That there was small negatively charged particles in the atom (electrons)
What did Einstein mathematically show?
That atoms exsist
What Democritus call the small particles he believed everything was made of.
Atomos
What is Dalton considered as?
The “father of chemistry“ because he brought back the idea of everything being made up of small particles
What field of science did her contribution create?
It helped the development of physics
What are the electron surrounded by?
A positive charged “pudding”
What did Einstein’s model show?
Look at packet for full question with picture.
That electromagnetic radiation was quantized
What did he believe the atom look like?
A solid ball
What law did Dalton hypothesize?
The law of conservation of mass
What did Marie Curie discover relating to atoms and radiatio?
That atoms themselves produce radiation
What did Thomson’s Experiment include?
He used cathode ray tubes to show that the atom was not solid
What other field did Einstein’s work help?
Physics