Classification of Materials According to Conductivity

What is the commonly used semiconductor in the modern electronics?

• Germanium

• Copper

• Silicon

• Carbon?

What is the atomic number of a Silicon?

• 4

• 14

• 12

• 16

Answer explanation

The atomic number of silicon is 14, meaning that there are 14 protons in its nucleus, balanced by 14 orbiting electrons.

The sharing of valence electrons is called ______.

• Electron Bonding

• Valency

• Covalent Bonding

• None of the Above

Is sea water a conductor?

• Yes

• No

• Not Sure

When the characteristics of a pure semiconductor are altered through a process known as ______.

• Doping

• Covalent Bonding

• Heating

• Lighting

A substance, body or material which has more electrons that are free to move and has 1 valence electrons.

• Insulator

• Semiconductor

• Metals

• Conductor

Covalent bond needs minimum of how many electrons?

• 1

• 3

• 8

• 2

The number of protons, balanced by an equal number of electrons, in an atom.

• Valence Number

• Neutron Number

• Atomic Number

• Valence Ring

A device that allows current to pass through it in only one direction.

• Resistor

• Transistor

• Diode

• Capacitor

Doping of Semiconductors

• Materials which can conduct electricity better than insulator, but not as well as conductors.

• The process of adding of a certain amount of specific impurities atoms in the pure semiconductor

• When an element has 4 electrons on the outer ring

• All of the Above