1.1 fundamental particles

Question 1

In 1661, Robert Boyle discovered…

Answer 1

elements.

Question 2

In 1803, John Dalton discovered…

Answer 2

atoms.

Question 3

In 1897, JJ Thompson discovered…

Answer 3

electrons.

Question 4

In 1909, Ernest Rutherford discovered…

Answer 4

the nucleus and found that the nucleus is positively charged. He suggested a new model called the “nuclear model”.

Question 5

In 1913, Niels Bohr discovered…

Answer 5

that electrons orbit the nucleus in shells. This led to the new model, the “quantum atomic model”.

Question 6

In 1932, James Chadwick discovered…

Answer 6

evidence for the existence of particles in the nucleus with mass but no charge. These are called neutrons.

Question 7

What is the relative charge and relative mass of a proton?

Answer 7

• Charge: +1
• Mass: 1

Question 8

What is the relative charge and relative mass of a neutron?

Answer 8

• Charge: 0
• Mass: 1

Question 9

What is the relative charge and relative mass of a electron?

Answer 9

• Charge: -1
• Mass: 1/1836

Question 10

An atom consists of…

Answer 10

a nucleus containing protons and neutrons surrounded by electrons.