Understanding Atomic Structure Quiz

What are atoms?

• Large particles that can be seen with a microscope

• Tiny particles that are the basic building blocks of all matter

• Particles that only exist in gases

• Particles that are only found in living organisms

Who first introduced the concept of the atom around 450 BC?

• John Dalton

• Ernest Rutherford

• Democritus

• James Chadwick

What are the three main parts of an atom?

• Protons, neutrons, and ions

• Protons, neutrons, and electrons

• Electrons, ions, and molecules

• Neutrons, molecules, and ions

What is the charge of a proton?

• Negative

• Neutral

• Positive

• Variable

Who discovered protons?

• Joseph John Thompson

• James Chadwick

• Ernest Rutherford

• John Dalton

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

Who discovered neutrons?

• Joseph John Thompson

• James Chadwick

• Ernest Rutherford

• John Dalton

What is the charge of an electron?

• Positive

• Neutral

• Negative

• Variable

Who discovered electrons?

• Joseph John Thompson

• James Chadwick

• Ernest Rutherford

• John Dalton

What determines the atomic number of an element?

• The number of electrons

• The number of neutrons

• The number of protons

• The number of ions