C1

Question 1

What are the limitations of the particle model?

Answer 1

It dosent account for :

• The space between particles
• The size of particles
• The forces between particles

Question 2

What is the formula for the ratio of distance to diameter?

Answer 2

diastance between atoms/ diameter of atom

Question 3

Whatare the forces between particles?

Answer 3

• The attractive forces between particles are the electrostatic forces of attraction between poitivve and negative charges
• Forces become weaker the further apart the particles are, strong- solid, weak- gas

Question 4

How do you measure bond length?

Answer 4

Distance between centres of 2 joined atoms

Question 5

What is an atom made up of?

Answer 5

3 Subatomic particles

• Protons
• Neutrons
• Electrons

Question 6

What is the relative mass of protons neutrons and electrons?

Answer 6

• Proton - 1
• Neutron - 1
• Electron - 0.0005

Question 7

What is the mass number of an element?

Answer 7

The no. of protons and neutrons

Question 8

What are isotopes?

Answer 8

-They are different forms of an element with same no. of protons but different no. of electrons