Semiconductor Devices

What is the smallest particle of an element?

• Atom
• Electron
• Proton
• Molecule

Which particle is negatively charged?

• Proton
• Neutron
• Electron
• Positron

The atomic number of an element is equal to the number of:

• Neutrons
• Protons
• Electrons
• Shells

Electrons in which shell have the lowest energy?

• Outermost
• Second
• Third
• Innermost

What is the maximum number of electrons in the second shell?

• 2
• 8
• 18
• 32

What is the formula for maximum electrons in a shell?

• n^2
• 2n
• 2n^2
• n^3

The outermost shell of an atom is called the:

• Core shell
• Valence shell
• Conduction shell
• Energy shell

Valence electrons are important because they:

• Are tightly bound
• Determine chemical properties
• Are in the nucleus
• Are always paired

Conductivity increases as the number of valence electrons:

• Increases
• Decreases
• Stays same
• Doubles

An atom that loses a valence electron becomes a:

• Negative ion
• Positive ion
• Neutron
• Proton