States Of Matter

Question 1

What is the atomic number of an element

Answer 1

The bottom number of the element it is also the bigger number.

Question 2

What does the kinetic theory of matter state

Answer 2

That all matter is made of tiny particles that are in constant motion

Question 3

How is the state of matter determined

Answer 3

The state of matter is determined by how much the particles move and how often they bump into each other.

Question 4

What is a solid

Answer 4

A substance with a definite volume and shape. Particles are closer together and do not move freely

Question 5

What is a liquid

Answer 5

A liquid is a substance with a definite volume but not a definite shape.

Question 6

What is a gas

Answer 6

A gas is a substance with no definite volume of shape

Question 7

What two things can happen when a substance looses or gains energy

Answer 7

Its temperature can change or its state can change

Question 8

What is sublimation

Answer 8

Where something goes from a solid straight to a gas and does not become liquid first

Question 9

What is the relative mass and charge of a neutron

Answer 9

Neutrons have a relative mass of 1 and a charge of 0

Question 10

What is the relative mass and charge of a proton

Answer 10

1 and +1

Question 11

What is the relative mass and charge of an electron

Answer 11

Almost 0 and -1

Question 12

How do you calculate the numbers of each particle

Answer 12

You find the atomic number and the atomic mass and for the atomic number there is that amount of protons and electrons and whatever is left to make up the atomic mass is the neutrons.
For example if the atomic mass is 10 and the atomic number is 6 there is 6 protons and electrons and 4 neutrons

Question 13

How many electrons can the first shell contain

Answer 13

A maximum of 2

Question 14

How many electrons can the second shell contain

Answer 14

A maximum of 8

Question 15

How many electrons can the third shell contain

Answer 15

A maximum of 8

Question 16

How many electrons can the fourth shell contain

Answer 16

The rest of those not in the first, second or third shell.

Question 17

What is an isotope

Answer 17

An element that has the same number of protons and electrons but not neutrons

Question 18

How do you work out the relative formula mass

Answer 18

By adding together the relative atomic masses of all the elements in a compound

Question 19

How do you work out the molecular mass of a compound (moles)

Answer 19

By adding together all the relative atomic mass. Eg, H2O would be H(1x2) +O 16 so one mole of water would be 18g

Question 20

What was avegadro’s number (1mole)

Answer 20

6.02 x 10 to the power of 23

Question 21

How do you find the mass of a compound?

Answer 21

Mr (relative atomic mass, big number) x moles

Question 22

How do you find how many moles of a compound you have?

Answer 22

Mass divided by Mr( relative atomic mass)

Question 23

What are the 3 steps of mole equations

Answer 23

1) convert into moles
2) look at the ratio
3) convert back to moles