Chapter 2: Matter And The Atomic Structure

Question 1

What is matter?

Answer 1

Matter are substances that has mass and occupies space

Question 2

Give the three types of matter

Answer 2

1. Atom
2. Molecules
3. Ions

Question 3

Give the three types of subatomic particles

Answer 3

1. Proton
2. Neutron
3. Electron

Question 4

What is the nucleon number

Answer 4

Total number of proton and neutron in the nucleus of an atom

Nucleon number = proton + neutron

Question 5

What is the proton number

Answer 5

The number of proton in the nucleus of an atom

Question 6

Give the three states of matter

Answer 6

1. Solid
2. Liquid
3. Gas

Question 7

What is an isotope

Answer 7

An isotope is the atoms of some element with the same proton number but different nucleon number. (Different amount of neutron)

Question 8

Define the difference between isotopes

Answer 8

Isotope have the same chemical property (reaction) because the atoms have same number of valence electrons.

Isotope have different physical properties (boiling point)

Question 9

What did John Dalton discovered

Answer 9

Atoms

Question 10

What did J.J Thomson discovered

Answer 10

Electrons

Question 11

What did Ernest Rutherford discovered

Answer 11

Protons

Question 12

What did Neils Bohr’s discovered

Answer 12

Electrons in an atom move in shells

Question 13

What did James Chadwick discovered

Answer 13

Neutrons

Question 14

What is an ion?

Answer 14

Charged particles. If an atom received electron, it forms anion, negative ions. If an atom donate its valence electron it forms cations, positive ions.

Question 15

What is a molecule

Answer 15

Made up of two or more non mental atoms which combine chemically by sharing valence electrons