What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Protons and Electrons balance the charge of an atom.

• True
• False

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

Which letter represents a proton?

• A
• B
• C
• D

Which letter represents an electron?

• A
• B
• C
• D

Which scientist conducted experiments using alpha particles and thin gold foil, which later helped him develop his model for the atom? 

• Ernest Rutherford
• Kneels Bore
• Niels Bohr
• Earnest Rutherfraud

Which scientist discovered the electron, which helped him develop a model of the atom?

• Niels Bohr
• John Dalton
• Ernst Rutherford
• J.J Thompson

Who is responsible for the model of the atom where electrons travel in specific paths or orbits around the nucleus?

• Einstein
• Bohr
• Planck
• Dalton