Chemistry Quiz

What is an insulator?

• A material that allows the flow of electrons

• A material that inhibits the flow of electrons

• A material with 1 to 4 free electrons in the outer ring

• A material that conducts electricity

What happens to the electrons in the outer ring of an insulator?

• They move freely to other atoms

• They are tightly bound to the atom

• They conduct electricity

• They are not present

Why can electrons in the outer ring of a conductor easily move to another atom?

• Because they are tightly bound to the atom

• Because they are loosely bound to the atom

• Because they are not bound to the atom at all

• Because they are negatively charged

What is a semi-conductor?

• A. A material that does not allow electrons to flow

• B. A material that easily allows electrons to flow

• C. A material that only allows protons to flow

• D. A material that blocks all types of particles

Why can atoms with 4 electrons in the outer ring easily move to another atom?

• A. Because they are tightly bound to the atom

• B. Because they are loosely bound to the atom

• C. Because they have no binding to the atom

• D. Because they are negatively charged

What is the significance of having 4 free electrons in the outer ring for a semi-conductor?

• A. It makes the material an insulator

• B. It allows the material to conduct electricity

• C. It makes the material a superconductor

• D. It has no significance

What does Electron Theory state about the movement of electrons?

• Electrons move from positive to negative

• Electrons move from neutral to positive

• Electrons move from atom to atom through the conductor towards positive

• Electrons move from positive to neutral

According to Electron Theory, what happens to electrons as they move through a conductor?

• They move towards the negative terminal

• They move towards the positive terminal

• They remain stationary

• They move towards the neutral terminal

What is another name for Conventional Theory in electrical physics?

• Electron Theory

• Hole Theory

• Proton Theory

• Neutron Theory

What does voltage do to electrons?

• It stops them

• It moves them through a conductor

• It increases their mass

• It changes their charge