The Atom/Contributions Flashcards
Who suggested that matter is made up of atoms
Dalton
Who proposed that atoms contain negatively charged particles called neutrons
Thomson
Who discovered the nucleus and it’s subatomic particles and suggested that the nucleus was made up of positively charged particles called protons and particles with no charge are called neutrons
Rutherford
Who proposed that electrons are located in shells around the nucleus
Bohr
Electrons have different amount of __________ and can jump back and forth between energy levels
Energy
All atoms are made up of three _________ protons electrons and neutrons
Subatomic
1 Positive
2 Negative
3 No charge
1 protons
2 electrons
3 neutrons
Who said atoms cannot be created destroyed or divided into smaller particles
Dalton
Who said that electrons occupy specific energy levels or shells
Bohr
Who said most of the mass of the atom is in the tiny dense positively charged nucleus
Rutherford
Who said all matter is made of small particles called atoms
Dalton
Who said most of the atom is empty space
Rutherford
Who said all atoms of the same element are identical
Dalton
Who said atoms contain negatively charged particles
Thomson
Who said the nucleus contains positively charged particles called protons and particles with no electric charge called neutrons
Rutherford
