Chapter 2:The Atom (Definitions)

Question 1

Summarise Dalton’s Atomic Theory

2

Answer 1

• all matter is made up of very small particles called atoms

- all atoms are indivisible.

Question 2

What are cathode rays?

4

Answer 2

• streams of electrons
• they travel in straight lines from the cathode to the anode
• they are deflected by electric and magnetic fields
• they have sufficient energy to move a small object such as a paddle wheel

Question 3

What may be summarised as follows:

• all matter is made up of very small particles called atoms
• all atoms are indivisible. They cannot be broken down into simpler particles

Answer 3

-Dalton’s Atomic Theory

Question 4

What are streams of negatively charged particles called electrons that travel in straight lines from the cathode to the anode, are deflected by electric and magnetic fields, and have sufficient energy to move a small object such as a paddle wheel?

Answer 4

-cathode rays