Introduction - TN Flashcards
What is the change from gas to solid called
Deposition
Diatomic Molecules
Iodine
Bromine
Chlorine
Fluorine
Oxygen
Nitrogen
Hydrogen
Monatomic
Single atoms
As you steadily add energy to a substance why is there a plateau of temperature every so often
Because energy is required to break bonds between the atoms
Describe the physical looks of Iron
Describe the physical looks of Sulfur
THEN
Describe the physical looks of Iron sulfide
Grey , Solid, Magnetic
Yellow, Solid, Non-magnetic
Grey-brown, Solid, Not magnetic
Describe the physical looks of Sodium
Describe the physical looks of Chlorine
THEN
Describe the physical looks or sodium chloride
White/rlly pale grey, Solid
Green gas
White solid
FeS
FeSO4
What are these two compounds called
Iron sulphide
Iron sulphate
How to draw a line of best fit
Straight line with the same number of points on each side
Diffusion experiment (tube)
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
Diffusion
Movement of particles from an area of high concentration to an area of low concentration
Brownian Motion
The random movement of particles
Saturated
a solution in which on more solute can disssolve
suspension
a solid present in a solution because it did not dissolve
where on a graph is a solution saturated
anywhere on the line
Solubility
how much of a substance able to dissolve in a solvent at a given temperature
Properties of metals
Solid at room temp and pressure
High melting and boiling points
Good conductors of heat and electricity
Malleable
Ductile
Strong
Dense
Why do metals have high melting and boiling points
due to a strong connection between positively charged metal ions and the sea of electrons
Why are metals malleable ductile and strong
Due to their Giant Metallic Structure. The ions are able to slide over each other so the object will not shatter.
Properties of non-metals
Thermal and electrical insulators
Most are liquids or gases at room temps
Brittle
weak
low melting and boiling points
Which group on the periodic table is the halogens
group 7
which group is the Noble gases
8 or 0
what is a compound
A substance made up of one or more types of atom chemically bonded
what is a mixture
two or more different substances not chemically bonded
why are metals good conductors of electricity
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
Differences between chemical and physical changes
Two or more substances react to make a new substance in chemical reactions. IN physical reactions, no new chemicals are formed.
what is a molecule
a compound is a type of molecule
Two or more atoms chemically bonded together
Test for water
Anhydrous copper(11) sulphate turns from white to blue
4 most abundant gases in the air
Nitrogen - 79%
Oxygen - 21%
Argon - 0.96%
Carbon Dioxide - 0.04%
how to remember the Reactivity series
Please Potassium
Stop Sodium
Lithium
Calling Calcium
My Magnesium
Australia Aluminium
Zebra Zinc
In Iron
Class, Copper
She Silver
Grunts Gold
Test for CO2
Limewater turning cloudy
what is it and what does the top number on the periodic table tell you
mass number - number of protons and neutrons
what is it and what does the bottom number on the periodic table tell you
atomic number - number of electrons OR no. protons (same)
what is an isotope
atoms of the same element with different number of neutrons
chemical and physical tests for water
anhydrous copper sulphate(white to blue)
-melting point=0C , boiling point=100C
what is the difference between compounds and molecules
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
what are the three types of compound
- metallic
- ionic
- covalent
