Atomic Structure

What are the 3 subatomic particles of an atom?

• carbon atom, proton, electron

• quarks, neutrons, protons

• nucleus, protons, electrons

• protons, neutrons, electrons

What is the center of an atom containing protons and neutrons?

• nucleus

• neutron

• proton

• electron cloud

What is a molecule?

• two elements bonded together (sharing electrons)

• a mixture of different substances

• smallest individual particles

• salt mixed in water

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

This particle is found in the nucleus and has no charge

• Neutron
• Proton
• Electron
• Orbital

This particle is found in the nucleus and has a positive charge

• Electron
• Proton
• Neutron
• Neutral

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Thomson
• Ernest Rutherford
• John Dalton
• Democritus

Who stated that all atoms of the same element are exactly alike?

• Democritus
• Dalton
• Thomson
• Bohr

Niels Bohr suggested that electrons.......

• are found in specific orbits
• electrons are scattered throughout the atom
• electrons move according to their energy level
• electrons are positive

Which is the correct sequence of the scientists who made major changes in the model of the atom?
1-JJ Thomson
2-Erwin Schrodinger
3-John Dalton
4-Niels Bohr
5-Ernest Rutherford

• 2, 1, 4, 3, 5
• 3, 1, 5, 4, 2
• 5, 3, 2, 1, 4
• 4, 3, 2, 1, 5