3.1.1.1 Fundamental Particles

Question 1

What is the History of the atom?

Answer 1

1661 - Robert Boyle - There are substances that cannot be made smaller than chemical elements
1803 - John Dalton - Elements were made of invisible atoms. Each atom has a specific mass/shape depending on the element
1896 - Henri Becequerell - Discovered radioactivity and therefore atoms weren’t invisible
1897 - JJ Thompson - discovered the electron and suggested that electrons where located within the atom as they are light (Plum Pudding Model)
1911 - Ernest Rutherford - discovered the positive charge in a tiny nucleus due to gold foil experiment
1932 - James Chadwick - neutrons in the nucleus

Question 2

What are the three sub-atomic particles?

Answer 2

Protons
Neutrons
Electrons

Question 3

What is in the nucleus?

Answer 3

Neutrons
Protons

Question 4

What are orbitals?

Answer 4

• Where the electrons are found
• They surround the nucleus
• Also know as electron shells

Question 5

What is the Relative mass/charge of a Proton?

Answer 5

• Relative charge of +1
• Relative mass of 1

Question 6

What is the Relative mass/charge of a Neutron?

Answer 6

• Relative charge of 1
• Relative mass of 0

Question 7

What is the Relative mass/charge of a Electron?

Answer 7

• Relative charge of -1
• Relative mass of 1/2000