C1. The Particulate Nature of Matter

Question 1

Solids have _____ volume

Answer 1

Fixed

Question 2

Liquids have a _____ volume

Answer 2

Fixed

Question 3

Gases have a _____ volume

Answer 3

Gases do not have a fixed volume

Question 4

Solids have a ____ density

Answer 4

High density

Question 5

Liquids have a ____ density

Answer 5

Medium density
Solids > Liquids > Gases

Question 6

Gases have a ____ density

Answer 6

Very low density

Question 7

Melting occurs

Answer 7

At a specific temperature (Melting point, m.p)
Heat energy transforms into Kinetic energy, allowing particles to move

Question 8

Boiling occurs

Answer 8

At a specific temperature (boiling point, b.p)
Heat causing bubbles of gas to form below the surface of a liquid, allowing for liquid particles to escape

Question 9

Freezing occurs

Answer 9

Occurs at the exact same temperature as melting (m.p and f.p of a pure substance are the same)
Reverse of melting

Question 10

Evaporation occurs

Answer 10

Occurs over a range of temperatures
Only when the surface of liquids where high energy particles can escape

Question 11

Condensation occurs

Answer 11

Occurs over a range of temperatures
when cooled, gas lose energy and so when they bump into eachother they lack the energy to bounce away and instead form groups together into a liquid

Question 12

What are the 3 changes of states?

Answer 12

Mass is conserved
Physical change
Reversible

Question 13

Conservation of mass?

Answer 13

When a substance changes state, the Mass is conserved (stays the same)

Question 14

three states of matter are [3]

Answer 14

solid, liquid and gas

Question 15

what takes place at the melting point? [2]

Answer 15

melting and freezing

Question 16

what takes place at boiling point? [2]

Answer 16

boiling and condensation

Question 17

what are is the structures of matter in terms of particles? [3]

Answer 17

Gas particles hold the most energy, are spread farther apart with a random motion

liquid particles > solids but < gases,

solids have the little energy, solid particles don’t move but vibrate

Question 18

describe an ion [1]

Answer 18

a positively or negatively charged atom due to chemical reaction (bonding)

Question 19

describe a molecule [1]

Answer 19

group of atoms joined together

Question 20

describe an atom [1]

Answer 20

structure of an element, what makes up everything

Question 21

what is diffusion? [1]

Answer 21

movement of particles from an area of high concentration to an area of low concentration