Atomic Structure and History

Electrons have a ___________ charge.

• Positive
• Negative
• Neutral

Tags

NGSS.HS-PS2-4

Neutrons are found in the...

• Nucleus
• Electron Cloud
• Electrons
• Protons

Tags

NGSS.MS-PS1-1

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

Tags

NGSS.MS-PS1-1

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

• Ernest Rutherford
• Heisenberg
• Democritus
• JJ Thomson

Tags

NGSS.HS-PS1-8

Believed that electrons traveled around the nucleus in definite paths.

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

Believed that all atoms of the same element would be the same.

• John Dalton
• JJ Thomson
• Niels Bohr
• Modern Atomic Theory

Tags

NGSS.MS-PS1-1

Discovered the electron within the atom

• Thomson
• Chadwick 
• Schrodinger & Heisenberg
• Dalton

Calculation used to find the number of neutrons in an atom

• Mass Number - Atomic Number

• Atomic Number - Atomic Mass

• Atomic Mass - Electrons

• none of these

These particles have a mass of 1 amu

• protons and neutrons
• protons and electrons
• neutrons and electrons

Tags

NGSS.MS-PS1-1