Year 9

Question 1

Protons, neutrons and electrons relative mass

Answer 1

P: 1, n:1, e: 0

Question 2

Relative charge of protons neutrons and electrons

Answer 2

P: positive 1, n: 0, e: negative 1

Question 3

What did dalton do (history of periodic table)

Answer 3

Ordered elements by mass

Question 4

What did newlands do?

Answer 4

Put the elements in periods of 8

Question 5

What did Mendeleev do?

Answer 5

He left gaps for undiscovered elements

Question 6

What did Moseley do?

Answer 6

He ordered them by atomic number

Question 7

Jj Thomson

Answer 7

Plum funding model

Question 8

Rutherford model

Answer 8

Nuclear model

Question 9

Niels Bohr

Answer 9

Energy level model

Question 10

James Chadwick’s model

Answer 10

Neutrons

Question 11

Alkali metals

Answer 11

Elements in group 1

Question 12

Group 7 is also known as…

Answer 12

Halogens

Question 13

Noble gases

Answer 13

Is group 0

Question 14

Displacement reaction

Answer 14

More reactive element takes the place of a less reactive compound

Question 15

Transition metals

Answer 15

Elements from the central block of the periodic table

Question 16

Compound

Answer 16

2 or more elements chemically bonded together

Question 17

Atom

Answer 17

The smallest particle of an element

Question 18

Molecule

Answer 18

2 or more atoms chemically bonded together

Question 19

Element

Answer 19

A substance made up of only 1 type of atom

Question 20

Mixture

Answer 20

2 or more substances mixed together but not bonded and don’t react

Question 21

Isotope

Answer 21

Atoms of the same element but with different numbers of neutrons

Question 22

The 5 separation techniques

Answer 22

1. Filtration: Using a filter to separate an insoluble solid from a liquid.
2. Crystallisation: The liquid (solvent) evaporates away leaving the soluble solid crystals (solute) behind.
3. Simple distillation: Separates a liquid from a solution. The solution is heated, it evaporates and then condenses for collection.
4. Fractional distillation: Separates multiple liquids from a solution, based on boiling points.
5. Chromatography: separating soluble substances from one another.

Question 23

Where r protons and nuetrons found

Answer 23

In the nucleus

Question 24

What did Niels Bohr discover

Answer 24

Energy shells and the electrons orbit in fixed distances from the nucleus

Question 25

What did James Chadwick discover

Answer 25

Neutrons

Question 26

How can you find out the number of protons in an atom

Answer 26

Atomic number

Question 27

What is the relative charge of each subatomic particle

Answer 27

P: +1 n:0 e:-1

Question 28

Why do atoms have no overall charge

Answer 28

Because they cancel eachother out