Atomic History and Structure

Neutrons are found in the...

• Nucleus
• Electron Cloud
• Electrons
• Protons

Tags

NGSS.MS-PS1-1

Electrons have a ___________ charge.

• Positive
• Negative
• Neutral

Tags

NGSS.MS-PS2-3

The _____________ is the number of protons and neutrons in an atom.

• Atomic Mass
• Atomic Symbol
• Atomic Number
• Atomic charge

Tags

NGSS.MS-PS1-1

The _____________ determines the identity of an object.

• # of Protons
• # of Electrons
• # of Neutrons
• Atomic Mass

Who believed that electrons were scattered amongst positively charged material.

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

Believed that atoms are small, hard particles that were "indivisible"

• Democritus
• Aristotle
• Schrodinger
• Greek Philosophers

Tags

NGSS.HS-PS1-7

Did experiments to show that atoms form compound in set ratios.

• John Dalton
• Schrodinger
• Niels Bohr
• JJ Thomson

Tags

NGSS.HS-PS1-7

Discovered that the atom has a small, dense, positively charged nucleus.

• Ernest Rutherford
• Heisenberg
• Democritus
• JJ Thomson

Believed that electrons traveled around the nucleus in definite paths.

• Niels Bohr
• John Dalton
• Modern Atomic Theory
• Ernest Rutherford

Determined that electron paths cannot be predicted and exist inside the Electron Cloud.

• Schrodinger & Heisenberg
• Ernest Rutherford
• John Dalton
• Democritus