Atomic History and Structure

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

Tags

NGSS.HS-PS1-8

Discovered the electron within the atom

• Thomson
• Chadwick 
• Schrodinger & Heisenberg
• Dalton

Discovered the nucleus of the atom through the Gold Foil Experiment

• Rutherford
• Chadwick
• Thomson
• Dalton

Created the Planetary Model of the atom

• Bohr
• Dalton
• Rutherford
• Chadwick

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

What subatomic particles are located in the electron cloud?

• quarks
• protons
• electrons
• neutrons

Which is an electron?

• A
• B
• C

Tags

NGSS.HS-PS1-1

Which item on this element square is the chemical symbol?

• Copper
• 29
• Cu
• 63.546