Chemistry revision Cards Unit one

HideShow resource information
What is an acid?
A sour substance which can attack skin it has a ph number of less then 7 .
1 of 67
What is activation energy ?
the minimum energy needed to start a reaction
2 of 67
What is an alakali
has a ph less then 7
3 of 67
what is an alkali metal?
elements in group 1
4 of 67
what is a alkane?
saturated hydrocarbons CnH2n+2 methane ethane propane
5 of 67
what is a alkene?
a unsaturated hydrocarbon which contains double bonds CnH2n e.g ethene c2 h4
6 of 67
what is an alloy ?
a mixture of metals and sometimes non metals
7 of 67
What is anhydrous?
describes a substane which does not contain water
8 of 67
wha is a anomalous result?
results which do not match the pattern of other results collected
9 of 67
what is aqueos soloution
the mixture made by adding a solouble substance to water
10 of 67
what is a atomic number?
the number of protons in an atom
11 of 67
what is a base?
the oxide,hydroxide or carbonate of a metal that will react with an acid forming a salt as one of its products.
12 of 67
what is biodiesel?
fuel for cars made from plant oils.
13 of 67
what is biofuel ?
fuel made from animal or plant products
14 of 67
what is bioleaching?
process of extracting metals from ores using microorganism
15 of 67
what does calcium hydroxise look like?
it is a white solid, it is used as a cheap alkali used in the industry made by reacting calcium oxide with water
16 of 67
What is in carbon steel?
alloy of iron containing samll amounts of carbon
17 of 67
what is the name of the iron taken diectly out of a blast furnace which is impure?
cast iron
18 of 67
A catalyst is?
a substance that sppeds a chemical reactiion but remains chemically unchanged itself .
19 of 67
what is fitted to exhausts of vehicles to to reduce pollutants being released?
a catalytic converter
20 of 67
what is made is made if you mix limestoone with clay?
cement
21 of 67
the process whereby small amounts of dissolved substances are seperated by running a solvent along a material is s clalled?
chromatography
22 of 67
explain collison theory
particles colliding with sufficient energy for a reaction to take place?
23 of 67
definition of compound
a substance made when two or more elements are chemically bonded
24 of 67
what is made when you mix cement,sand and rock with water
concrete
25 of 67
the attraction bettween two atoms that share one or more pairs of electrons is called?
covalent bonding
26 of 67
Give 2 ways of cracking.
hydrocarbon vapor is passed over a hot catalys 2)mixed with steam and heated to a high temperature
27 of 67
definition of delocalised electron
bonding electron that is no longer associated with any one particular atom.
28 of 67
directly proportianal means
it shows a positive linear relationship that crosses trhough the origin
29 of 67
when one element takes the place of another compund it is clled? give a example
Displace reaction iron +copper sulfate=iron sulfate+copper
30 of 67
distillation is?/
seperation of liquid from a mixture of evapouration followed by condensation
31 of 67
a drwing to show arrangement of outer shell of an atom
dot and cross diagram
32 of 67
a double bond is?
a covalent bond made by sharing two pairs of electrons
33 of 67
a additive which is approved in europe is called a?
e number
34 of 67
electrolosys is when?
the breaking down of a substance containing ions by electrolysis
35 of 67
a electolyte is ..?
a liquid containing free moving ions that is broken down by electricity in the proocess of electrolosis
36 of 67
electon has a ........... charge?
negative
37 of 67
electoplating is when?
thin layer of a metal is deposited on an object durinh electolosis.
38 of 67
empiricla formula is the ration of
elements in a compound
39 of 67
a emulsifier is ?
a substance which helps keeps immicible liquids e.g water and oil mixed so they do not seperate out.
40 of 67
emulsion is a?
mixture od liquids that do not dissolve in eachother
41 of 67
when thenamount of substances present in the reacting mixture remain constant is called?
equillbrium
42 of 67
ethene has the formula
C2H4
43 of 67
A REACTION THAT GIVES OUT ENERGY IS CALLED
EXOTHERMIC JUST THINK OF A FIR EXIT
44 of 67
fair test is seen as
when the independant variable has been allowed to effect the dependant variable
45 of 67
fermentation
the reaction in which enzymes in yeast turn glucose into ethanol and co2
46 of 67
a substance added to a food to preserve /improve taste/texture/appearance is called a ?
food additive
47 of 67
fraction is a hydrocarbon with
similar boiling points
48 of 67
fellerene is?
hexagonal rings of carbon atoms
49 of 67
a huge 3D network of atoms e.g diamond or graphite is called
giant covalent structures
50 of 67
giant lattice is
a huge 3d network of giant ionic lattice e.g sodium chloride
51 of 67
the reflection of sunlight by tiny solid particles in the air is called..
global dimming
52 of 67
global warming is?
increasing average temp on earth can be influenced by co2 levels.
53 of 67
group is?
elements in each column 1-7
54 of 67
half equation describes
reduction
55 of 67
hardening is the process of
reacting plant oils with hydrogen to raise their mp used to make margarine
56 of 67
hydrated is when
substance contains water in its crystals
57 of 67
hydration is when ............. is chemically added to a compound
h2o
58 of 67
hydrogenated oil is when
oil which has had hydrogen added t it reduces its degree of saturation in the hardening production.
59 of 67
hydrophyllic is water............
LOVING
60 of 67
hydrophobic is water ..............
hating
61 of 67
inclompete oxygen happens when there is not enough oxygen it produces .....
co, other toxic products
62 of 67
inert means
unreactive
63 of 67
intermolecular force is?
the attraction between the individual molecules in a covalently bonded substance.
64 of 67
a charged particle produced by the loss or gain of electron is called a
ion
65 of 67
ionic bonding is when
the electrostatic force of attraction between positively and negatively charged of ions.
66 of 67
an isotope is?
a atom that has the same number of protons but different number of neutrons. ie it has the same number atomic number but different mass number
67 of 67

Other cards in this set

Card 2

Front

What is activation energy ?

Back

the minimum energy needed to start a reaction

Card 3

Front

What is an alakali

Back

Preview of the front of card 3

Card 4

Front

what is an alkali metal?

Back

Preview of the front of card 4

Card 5

Front

what is a alkane?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »