Year 10 Topic 1

Question 1

What did dalton state

Answer 1

All elements are made up of small invisible particles called atoms
Atoms can’t be destroyed or created
Atoms of different elements have different properties
When atoms combine the form molecules or compounds

Question 2

Who proposed the idea that matter is composed of small indivisible particles

Answer 2

Democritus and leucippus

Question 3

What idea did Aristotle propose

Answer 3

That matter is made up of 4 elements
Earth
fire
Water
Air

Question 4

Who discovered the electron

Answer 4

J.J Thompson

Question 5

What is an atom

Answer 5

Atoms are composed of small,dense, positively charged nuclei at the centre of protons and neutrons (most of the mass) with negatively charged electrons in shells orbiting the nucleus

Question 6

Relative mass of protons,neutrons and electrons

Answer 6

1
1
1/1840

Question 7

Relative charge of protons, neutrons and electrons

Answer 7

0
1
-1

Question 8

What is the atomic number

Answer 8

This is the umber of protons is an atom
It is the small number

Question 9

What is the mass number

Answer 9

This id the total number of protons and neutrons in the nucleus of an atom

Question 10

What is an element

Answer 10

It’s a substance that consists of only one type of atom and it can’t be broken down into anything simpler by chemical means