Semiconductor and Atomic Structure Concepts

What are the three basic particles that make up an atom?

• Neutrons, Electrons, Positrons

• Protons, Electrons, Photons

• Protons, Neutrons, Muons

• Protons, Neutrons, Electrons

What is the atomic number of an element?

• Number of protons in the nucleus

• Total number of particles in an atom

• Number of neutrons in the nucleus

• Number of electrons in an atom

Which of the following materials is classified as a conductor?

• Rubber

• Copper

• Silicon

• Glass

What is the maximum number of electrons that can exist in the second shell?

• 2

• 18

• 32

• 8

What type of semiconductor is formed by adding trivalent impurities?

• Intrinsic

• P-Type

• N-Type

• Extrinsic

What is the process of an atom losing or gaining a valence electron called?

• Ionization

• Covalent Bonding

• Doping

• Valence Band

Which of the following is a characteristic of a semiconductor?

• Has 5-8 valence electrons

• Has 4 valence electrons

• Has 1-3 valence electrons

• Is a perfect insulator

What is the term for electrons that are loosely bound to the atom?

• Valence Electrons

• Free Electrons

• Conduction Electrons

• Core Electrons

What is the energy gap in a semiconductor?

• Energy required for electrons to jump from valence to conduction band

• Energy released when electrons fall back to valence band

• Energy needed to ionize an atom

• Energy that holds the nucleus together

What happens to the conductivity of a semiconductor as temperature increases?

• It decreases

• It becomes an insulator

• It remains constant

• It increases