Atomic Structure and Theory

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Discovered the nucleus of the atom through the Gold Foil Experiment

• Rutherford
• Chadwick
• Thomson
• Dalton

Discovered the electron within the atom

• Thomson
• Chadwick 
• Schrodinger & Heisenberg
• Dalton

Created the Planetary Model of the atom

• Bohr
• Dalton
• Rutherford
• Chadwick

Believed that atoms of the same element are identical to each other

• Bohr
• Rutherford
• Dalton
• Thomson

Most of the volume an atom is made of this

• the nucleus
• the protons
• the neutrons
• empty space

The overall charge of all atoms (not ions)

• positive
• negative
• neutral
• sometimes positive and sometimes negative

The best images of atoms look fuzzy because of their 

• small size 
• constant motion
• fast-moving electrons
• thunder and lightning

The atom's mass is determined by the number of 

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

Tags

NGSS.HS-PS1-7

All atoms of a particular element have the same number of these

• electrons
• neutrons
• protons