Atomic Theory Flashcards
What are the names of all the scientists in this lesson
Democritus, John Dalton, J.J. Thomson, Ernest Rutherford, Niels Bohr, Erwin Schrodinger, and Warner Heisenberg.
What year was Dalton’s discovery
1803
What year was Thomson’s Discovery
1897
What year was Rutherford’s Discovery
1909
What year was Bohr’s discovery
1913
What year was Heisenberg and Schrodinger’s discovery made
1926
What term did Democritus coin and what does it mean
He coined the term Atomos and it means can’t be divided.
What year did Democritus discover his theory
440 BCE
What was Thomson’s model called( both options )
The plum pudding model or the chocolate chips ice cream model
What did Thomson’s theory state
That there were negatively charged particles in atoms called electrons
What did Democritus not do that every other person did
He didn’t perform experiments
Who discovered that atoms can be negatively charged
J.J. Thomson
What do Daltons model look like
A bowling ball or a Billiard Ball
What was the Name of Rutherford’s experiment
The gold foil experiment
What did Rutherford’s theory state
That atom have a positively charged nucleus and negatively charged electrons orbiting around the nucleus
The levels on Rutherford’s model looked like what
Rungs on a ladder
What did Bohr’s theory state
That electrons move in certain paths or energy levels around the nucleus
Schrodinger and Heisenberg’s theory stated what
That electrons do NOT travel in certain paths
What is an electron cloud
A region where electrons are likely to be found
What was the model with the electron cloud called
The cloud model
What year did James Chadwick receive the Nobel Peace Prize
1935
What did James Chadwick discover and is that discovery positively or negatively charged
He discovered the neutron and a neutron is neutral( not positive or negatively charged. )
What three things were stated in Dalton’s theory
- Atoms cannot be divided or destroyed.
- Atoms join to create different substances
- All atoms of the same substances are identical
