Atomic Theory

"Everything is composed of atoms" was stated by:

• Democritis
• Dalton
• Moseley
• Einstein

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

Tags

NGSS.HS-PS1-8

The word "atom" comes from a Greek word that means

• Invisible
• Indivisible
• Undivided

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Thomson
• Ernest Rutherford
• John Dalton
• Democritus

Who came up with the model of an atom pictured?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick

Electron cloud is based on

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

James Chadwick discovered the ________.

• proton
• neutron
• electron
• nucleus

What did Thomson discover?

• electron
• proton
• neutron
• electron cloud

John Dalton stated:

• Atoms are tiny, invisible particles.

• Atoms of one element are all the same.

• Atoms of different elements are different.

• Compounds form by combining atoms.

• All of the statements listed.

Tags

NGSS.HS-PS1-7

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