Quiz on Basic Atomic Structure

What is the smallest part of any material called?

• Atom

• Molecule

• Proton

• Electron

What charge do protons have?

• Negative

• Neutral

• Positive

• No charge

In an electrically neutral atom, the number of protons is equal to the number of what?

• Neutrons

• Electrons

• Molecules

• Atoms

Which of the following is an example of the simplest atom?

• Helium

• Uranium

• Hydrogen

• Oxygen

What is the charge of an electrically neutral atom?

• Positive

• Negative

• Neutral

• Variable

Why is the single electron in the outer orbit of a copper atom easily detached?

• It is strongly attached to the nucleus.

• It is far from the nucleus and repelled by inner electrons.

• It is positively charged.

• It is in a stable orbit.

What happens when the balance of protons and electrons in an atom is upset?

• The atom becomes neutral.

• The atom becomes negatively charged.

• The atom becomes positively charged and attracts electrons.

• The atom remains unchanged.

What is the source of electromotive force (EMF) in a circuit?

• Resistor

• Conductor

• Battery

• Switch

What is the resultant electron flow around a circuit called?

• Voltage

• Resistance

• Electric current

• Capacitance

Diagram showing random free electron movement and conventional current direction in a circuit.

• Electrons move in the direction of the conventional current.

• Electrons move randomly and not in the direction of the conventional current.

• Conventional current direction is opposite to electron movement.

• Electrons are stationary in a circuit.