Topic 4b- Current nuclear model

Question 1

How much smaller is the radius of the nucleus compared to the radius of the atom?

Answer 1

10,000 times smaller

Question 2

What are the relative masses of protons, neutrons and electrons?

Answer 2

• proton- 1
• neutron- 1
• electron- 1/2000

Question 3

What are the realtive charges of protons, neutrons and electrons

Answer 3

• proton → +1
• neutron → 0
• electron → -1

Question 4

What is the atomic number equal to?

Answer 4

The number of protons

Question 5

What is the mass number equal to?

Answer 5

The number of protons plus the number of neutrons

Question 6

What do isotopes have

Answer 6

Different numbers of neutrons