Topic 1: Atoms

Question 1

What is everything made up of?

Answer 1

Atoms

Question 2

Electrons

Answer 2

• Negatively charged particles
• Located outside the nucleus
• Mass approx 0

Question 3

Protons

Answer 3

• Positvely charged particles
• Located inside the nucleus
• Mass of 1amu

Question 4

Neutrons

Answer 4

• No charge particles
• Located outside the nucleus
• Mass of 1amu

Question 5

What does the atomic number also tell us?

Answer 5

Number of protons (always) and number of electrons

Question 6

How to find the mass number of an element?

Answer 6

Add number of protons and number of electrons

Question 7

How to find the number of neutrons in an element?

Answer 7

Mass number - atomic number

Question 8

What are electron arrangements?

Answer 8

The way electrons are arranged in energy levels

Question 9

How many electrons can the first energy level hold?

Answer 9

2

Question 10

How many can the second and so on energy levels hold?

Answer 10

8 (true for the first 20 elements)

Question 11

Atom

Answer 11

Smallest particle of elements

Question 12

Molecule

Answer 12

A group of two or more atoms held together by chemical bonds

Question 13

Elements

Answer 13

A substance that consists only one type of atom

Question 14

Compound

Answer 14

A substance formed by two or more different types of elements