C1 - Particles Flashcards Preview

Chemistry OCR GCSE > C1 - Particles > Flashcards

Flashcards in C1 - Particles Deck (19):
1

What happens to the vibrations of particles when a solid becomes hotter?

They vibrate more

2

What happens if you heat a solid?

It will melt and become liquid

3

How are the particles in solids arranged?

In a regular lattice arrangement

4

How do the particles in solids move?

They vibrate around a fixed position

5

How do the particles in liquids move?

They move constantly with random motion

6

What happens if you cool a liquid

It will freeze and become solid

7

What happens if you heat a liquid enough?

It will evaporate and become a gas

8

How do the particles in gases move?

They travel in straight lines and only interact when they collide

9

What do gases exert?

Pressure

10

What happens if you cool a gas?

It will condense and become a liquid

11

What are the limitations of the particle model?

1) does not give any idea of the size of the particles
2) does not give any idea of the space between the particles
3) does not show any of the forces between the particles

12

What is a physical change?

1) when a substance changes from one state of matter to another
2) no new substances are made

13

What happens during a chemical reaction?

1) bonds between atoms break
2) atoms change places
3) atoms from the reactants rearrange themselves to form products

14

What are atoms

Tiny particles of matter which make up everything in the universe

15

How did John Dalton describe atoms?

1) solid spheres
2) different spheres made up different elements

16

How did JJ Thompson describe atoms?

1) plum pudding model
2) atoms weren't solid spheres
3) atoms contained negatively charged particles - electrons

17

How did Ernest Rutherford describe atoms?

1) in the atom there is a tiny, positively charged nucleus at the centre
2) most of the atom is empty space

18

What was the gold foil experiment?

1) positively charged alpha particles were fired at an extremely thin sheet of gold
2) most particles passed straight through the gold sheet
3) some particles were deflected more than expected
4) a small number of particles were deflected backwards

19

How did Niels Bohr describe atoms?

1) electrons in atoms were contained in shells
2) electrons can only exist in fixed orbits, or shells
3) each shell has a fixed energy