Term
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Definition
Mass in grams
_________________
Molar Mass |
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Term
| Formula Unit is the ________ of the molecule, e.g. in Cu it is _____ and in 02 it is __ |
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Definition
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Term
| Avogadro's constant is how many __________ are in one moles |
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Definition
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Term
| To find the number of atoms in a given weight of a substance? |
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Definition
| Divide by atomic weight and multiply by avogadro's number |
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Term
CH4 + 202 -> C02 + 2h20
How many moles are there of each substance? |
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Definition
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Term
| Concentration in moldm3 = |
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Definition
conc in gdm-3
________________
molar mass in g mol-1 |
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Term
Mass of atom =
Atomic number =
number of neutrons =
number of electrons = |
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Definition
protons + neutrons
protons
mass number - atomic number
number of proteins |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Emission of energy from a nucleus that is moving from a higher energy level to a lower one |
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Term
| Nuclear fusion is __________ and requires so much ______ and ________ because ______________ |
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Definition
| two light nuclei fusing together, heat, pressure, they have to overcome the strong repulsion between the positive nuclei |
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Term
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Definition
| The time it takes half the radioisotope to decay |
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Term
How many electrons are in sub shell:s
p
d
f |
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Definition
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Term
| How are the shells and subshells written? |
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Definition
| 1s2 2s2, 2p6, 3s2, 3p6, 4s2, 3d10 |
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Term
| The energy required to pull one electron out of an atom is the: |
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Definition
| first ionisation enthalpy |
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Term
| the second ionisation requires ________ than the first |
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Definition
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Term
| Ionic dot and cross diagrams are shown with |
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Definition
[ ]+ [ xx x ]
[ Na ] + [x Cl x ]
[ ] [o xx ] (square brackets) |
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Term
| Covalent dot and cross diagrams are shown |
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Definition
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Term
| Dative covalent bonds are |
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Definition
| like normal covalent bonds, except both electrons come from one atom |
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Term
| Polar molecules are polar as: |
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Definition
| one atom is more electronegative than the other |
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Term
| A model of metallic bonding should have |
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Definition
| delocalised electrons, at least six positive metal ions in a regular order |
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Term
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Definition
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Term
These molecule shapes have what angles between bonds:tetrahedral
linear
pyramidal
bent
planar triangular
bipyrmadal |
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Definition
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Term
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Definition
| the same molecular formula, but different structures |
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Term
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Definition
| Both the groups on same side |
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Term
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Definition
| Both groups on opposite sides |
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Term
∆H is _______ for: exothermic reactions
endothermic reactions |
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Definition
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Term
| Standard enthalpy of combustion is always |
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Definition
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Term
| The energy needed to break a bond in a molecule is the |
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Definition
| bond dissociation enthalpy |
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Term
| The shorter the bond the _________ the bond enthalpy |
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Definition
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Term
| Double bonds have _______ bond enthalpies than single |
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Definition
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Term
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Definition
| the measure of disorder; how many ways the particles can be arranged |
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Term
| Entropy is higher in _______ than _________ than ______. |
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Definition
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Term
| The periodic table was based on the one designed by: |
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Definition
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Term
| the periodic table is in _________ blocks, called_,_,_ and _ |
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Definition
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Term
| Group 2 metals are ________ found in nature due to their ___________ |
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Definition
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Term
| Group 2 elements reach with water to form |
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Definition
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Term
| The general formula of group 2 oxides is _____ and hydroxides is _________, and carbonates is _______ |
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Definition
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Term
| when group 2 carbonates heat they ___________ forming ___________ |
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Definition
| decompose, oxide and carbon dioxide |
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Term
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Definition
| It doesnt matter which indermediate stages occur in a chemical reaction, as londg as the initial and final conditions are the same so will the enthalpy change |
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Term
| Hydrocarbons contain only |
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Definition
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Term
| Alkanes are ___________ hydrocarbons |
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Definition
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Term
| Alkenes are ___________ hydrocarbons |
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Definition
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Term
----- a dotted line represents a line
_____ a straight line represents a line
/
\ a wedge represents a line |
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Definition
behind the plane of the paper
in the plane of the paper
in front of the plane of the paper |
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Term
| oxidation of alkenes produces |
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Definition
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Term
| Group 7 elements with alkenes form _________ and this is a ________________ |
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Definition
| halogenoalkanes, electrophilic addition reaction |
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Term
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Definition
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Term
| The ratio of air to petrol is the |
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Definition
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Term
| a high stoichiometric ratio is |
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Definition
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Term
| a lean stoichiometric ratio is |
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Definition
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