Introduction - TN

Question 1

What is the change from gas to solid called

Answer 1

Deposition

Question 2

Diatomic Molecules

Answer 2

Iodine
Bromine
Chlorine
Fluorine
Oxygen
Nitrogen
Hydrogen

Question 3

Monatomic

Answer 3

Single atoms

Question 4

As you steadily add energy to a substance why is there a plateau of temperature every so often

Answer 4

Because energy is required to break bonds between the atoms

Question 5

Describe the physical looks of Iron
Describe the physical looks of Sulfur
THEN
Describe the physical looks of Iron sulfide

Answer 5

Grey , Solid, Magnetic
Yellow, Solid, Non-magnetic

Grey-brown, Solid, Not magnetic

Question 6

Describe the physical looks of Sodium
Describe the physical looks of Chlorine
THEN
Describe the physical looks or sodium chloride

Answer 6

White/rlly pale grey, Solid
Green gas

White solid

Question 7

FeS
FeSO4
What are these two compounds called

Answer 7

Iron sulphide
Iron sulphate

Question 8

How to draw a line of best fit

Answer 8

Straight line with the same number of points on each side

Question 9

Diffusion experiment (tube)

Answer 9

Ammonia solution on cotton wool at one end
Hydrochloric acid on cotton wool on the other side
They react to form a ring of Ammonium chloride
Which is closer to the hydrochloric acid because it has a greater mass so the particles move slower than the ammonia solution

Question 10

Diffusion

Answer 10

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

Question 11

Brownian Motion

Answer 11

The random movement of particles

Question 12

Saturated

Answer 12

a solution in which on more solute can disssolve

Question 13

suspension

Answer 13

a solid present in a solution because it did not dissolve

Question 14

where on a graph is a solution saturated

Answer 14

anywhere on the line

Question 15

Solubility

Answer 15

how much of a substance able to dissolve in a solvent at a given temperature

Question 16

Properties of metals

Answer 16

Solid at room temp and pressure
High melting and boiling points
Good conductors of heat and electricity
Malleable
Ductile
Strong
Dense

Question 17

Why do metals have high melting and boiling points

Answer 17

due to a strong connection between positively charged metal ions and the sea of electrons

Question 18

Why are metals malleable ductile and strong

Answer 18

Due to their Giant Metallic Structure. The ions are able to slide over each other so the object will not shatter.

Question 19

Properties of non-metals

Answer 19

Thermal and electrical insulators
Most are liquids or gases at room temps
Brittle
weak
low melting and boiling points

Question 20

Which group on the periodic table is the halogens

Answer 20

group 7

Question 21

which group is the Noble gases

Answer 21

8 or 0

Question 22

what is a compound

Answer 22

A substance made up of one or more types of atom chemically bonded

Question 23

what is a mixture

Answer 23

two or more different substances not chemically bonded

Question 24

why are metals good conductors of electricity

Answer 24

because electricity is literally the flow of electrons and as the electrons in the structure are delocalised they are free to move and carry the charge

Question 25

Differences between chemical and physical changes

Answer 25

Two or more substances react to make a new substance in chemical reactions. IN physical reactions, no new chemicals are formed.

Question 26

what is a molecule

Answer 26

a compound is a type of molecule Two or more atoms chemically bonded together

Question 27

Test for water

Answer 27

Anhydrous copper(11) sulphate turns from white to blue

Question 28

4 most abundant gases in the air

Answer 28

Nitrogen - 79% Oxygen - 21% Argon - 0.96% Carbon Dioxide - 0.04%

Question 29

how to remember the Reactivity series

Answer 29

Please Potassium Stop Sodium Lithium Calling Calcium My Magnesium Australia Aluminium Zebra Zinc In Iron Class, Copper She Silver Grunts Gold

Question 30

Test for CO2

Answer 30

Limewater turning cloudy

Question 31

what is it and what does the top number on the periodic table tell you

Answer 31

mass number - number of protons and neutrons

Question 32

what is it and what does the bottom number on the periodic table tell you

Answer 32

atomic number - number of electrons OR no. protons (same)

Question 33

what is an isotope

Answer 33

atoms of the same element with different number of neutrons

Question 34

chemical and physical tests for water

Answer 34

anhydrous copper sulphate(white to blue) -melting point=0C , boiling point=100C

Question 35

what is the difference between compounds and molecules

Answer 35

a compound is a TYPE of molecule molecule = two or more different atoms chemically bonded together compound = two or more different TYPEs of atoms chemically bonded together

Question 36

what are the three types of compound

Answer 36

- metallic - ionic - covalent