Chapter 1

Question 1

It is the tiny building block of all matters. It comes from the Greek word “Atomos” which means “Not Divisible”.

Answer 1

Atom

Question 2

Are formed when atoms react with one another

Answer 2

Chemical Compounds

Question 3

It is the smallest part of a compound that can exist independently

Answer 3

Molecule

Question 4

It is the central part of the atom which was also discovered in 1911

Answer 4

Nucleus

Question 5

It is the particles found inside the protons and neutrons and was discovered in 1958

Answer 5

Quarks

Question 6

It is a positive ion

Answer 6

Cation

Question 7

It is a negative ion

Answer 7

Anion

Question 8

It is an atom with a net charge

Answer 8

Ion

Question 9

Materials that allows electrons to easily pass through it
ex. Copper, Silver, Gold, Aluminum, Mercury, Steel, Iron. Its Valence electron is always less than 4

Answer 9

Conductors

Question 10

Materials that do not allow electrons to easily pass through it
- ex. Nitrogen, Glass, Porcelain, Plastic, Rubber.
Its valence electron is always greater than 4

Answer 10

Insulator

Question 11

• A material that is neither a good conductor or a good insulator.
• Its Valence electrons is always equals to 4

Answer 11

Semiconductor

Question 12

This material is created by adding elements with five valence electrons

Answer 12

n - Type Material

Question 13

A semiconductor material that has been subjected to the doping process is called _________

Answer 13

Extrinsic Material

Question 14

It is a process of adding impurities to intrinsic semiconductors to alter their properties

Answer 14

Doping

Question 15

This materials are created by adding atoms with three valence electrons

Answer 15

p -Type Materials

Question 16

He is a chemist/physicist and the Founder of Modern Atomic Theory

Answer 16

John Dalton

Question 17

He discovered “Electron” on April 30, 1897

Answer 17

Joseph Thomson

Question 18

He is the Father of Nuclear Physicist, he discovered proton in 1919

Answer 18

Ernest Rutherford

Question 19

He discovered “neutron” in 1932

Answer 19

James Chadwick

Question 20

He developed the Bohr model of the atom

Answer 20

Niels Bohr

Question 21

He is the founder of the first integrated circuit and the and co-inventor of the electronic handheld calculator.

Answer 21

Jack Kilby

Question 22

Semiconductors fell into two classes which is the ______ and the _______?

Answer 22

Single Crystal and Compound

Question 23

The three semiconductors used most in the construction of electronic devices are?

Answer 23

• Ge (Germanium),
• Si (Silicon)
• GaAs (Gallium Arsenide)

Question 24

Atoms with four valence electrons

Answer 24

Tetravalent

Question 25

Atoms with three valence electrons

Answer 25

Trivalent

Question 26

Atoms with five valence electrons

Answer 26

Pentavalent

Question 27

It is the bonding of atoms strengthened by the sharing of electrons

Answer 27

Covalent Bonding

Question 28

The farther an electron is from the nucleus, the _____ is the energy state

Answer 28

Higher

Question 29

The majority carriers in n-type materials are?

Answer 29

Electrons

Question 30

The majority carries in p-type materials are?

Answer 30

Hole

Question 31

The minority carriers in n-type materials are?

Answer 31

Holes

Question 32

The minority carriers in p-type materials are?

Answer 32

Electrons