Atomic Theory Scientists

Electron cloud is based on

• Quantum Mechanics
• Gold Foil Experiment
• Matter is made up of small particles called atoms
• Nuclear Theory

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Who believed that all matter is made up of small particles called atoms?

• Dalton
• Rutherford
• Bohr
• Chadwick

This scientist believed that electrons orbit the nucleus.

• Dalton
• Bohr
• Rutherford
• Chadwick

Tags

NGSS.MS-PS1-1

What was wrong with Dalton's model of the atom?

• He said the atom had a dense, positive center.
• He said the atom was made of positive matter surrounding negative particles.
• He said atoms cannot be subdivided, created or destroyed.
• He said e- follow specific paths.

What was wrong with Bohr's model of the atom?

• He said the atom had a dense, positive center.
• He said the atom was made of positive matter surrounding  negative particles.
• He said atoms cannot be subdivided, created or destroyed.
• He said e- follow specific paths.

The "plum pudding" model was proposed by:

• Dalton
• Rutherford
• Democritis
• JJ Thomson

His atomic model included a dense positive core in an atom, surrounded by negatively charged particles

• Joseph Thomson
• Niels Bohr
• Ernest Rutherford
• John Dalton

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Thomson

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

Tags

NGSS.HS-PS1-8

Which is the correct sequence of the scientists who made major changes in the model of the atom?
1-JJ Thomson
2-Erwin Schrodinger
3-John Dalton
4-Niels Bohr
5-Ernest Rutherford

• 2, 1, 4, 3, 5
• 3, 1, 5, 4, 2
• 5, 3, 2, 1, 4
• 4, 3, 2, 1, 5