Atoms, Elements And Compounds

Question 1

How many atoms makes up an element?

Answer 1

One

Question 2

How are atoms represented?

Answer 2

Chemical symbols

Question 3

Atoms have a tiny ……. And are surrounded by ………

Answer 3

1) Nucleus

2) Electrons

Question 4

What are particles with a positive charge called?

Answer 4

Protons

Question 5

What are particles with a negative Charge called

Answer 5

Neutrons

Question 6

What are the total number of protons and electrons called?

Answer 6

The mass number.

Question 7

What does every element have?

Answer 7

An atomic number.

Question 8

What charge do electrons have?

Answer 8

Negative.

Question 9

Why are atoms neutral?

Answer 9

The amount of protons cancel out the amount of electrons.

Question 10

Ionic bonding:

1) Where does is occur?
2) When an atom loses or gains an electron it forms an …?
3) Metal atoms lose electrons so they form …….. ….?
4) Non-metal atoms gain electrons so they form …….. ….?

Answer 10

1) Between metal and non-metal atoms
2) Ion
3) Positive Ions
4) Negative Ions

Question 11

What is a molecule?

Answer 11

A molecule is when two or more atoms join together

Question 12

What is a convalent bond?

Answer 12

When two non-metal atoms share electrons

Question 13

What is a chemical reaction?

Answer 13

Where there is change and a new substance is made