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Unit 1 chemistry revision : chem 1 ©
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Topic 1.1 spec reference 3.1.…read more

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Unit 1 chemistry revision : chem 1 ©
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Chromium and copper deviate from the pattern in which their 3d shells are filled first (or half filled)
before the 4s shell.…read more

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Unit 1 chemistry revision : chem 1 ©
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V m3
n Number of moles
R 8.31
t kelvin
Ideal gas equation:
pV = nRt
Empirical formula and Molecular formula
Empirical formula
The simplest ratio of elements in a compound
01. Find the masses of each element
02. Find the number of moles of each element
03.…read more

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Covalent bond This involves shared pair of The bond present between
electrons atoms that have a relatively to
electronegativity difference
Coordinate bond An electron rich atom denotes a
(covalent bond type) lone pair of electrons to an
electron deficient atom.…read more

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Unit 1 chemistry revision : chem 1 ©
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Require a lot of energy to
break
Metallic The attraction of the
crystals positive to negative
throughout the crystals.
The high melting point is a
result of strong metallic
bonds
Molecular Are soft and break easily
crystals Has a low melting point
and sublimes to form
gaseous molecules
There are charged particle
to carry electricity
Macromolecula A high melting point
r crystals
graphite
There are covalent bond and
weaker Van der Waals.…read more

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Unit 1 chemistry revision : chem 1 ©
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Valence Bonding Lone shape Bond
shell pairs pairs Angle (o)
electron
pairs
2 2 0 LINEAR 180
3 3 0 TRIGONAL PLANAR 120
3 2 1 BENT 115 - 118
4 4 0 TETRAHEDRAL 109.5
4 3 1 TRIGONAL PYRAMIDAL 107
4 2 2 BENT 104.…read more

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Topic 1.4 spec reference 3.1.…read more

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Unit 1 chemistry revision : chem 1 ©
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a
s
t
r
o
n
g
e
r
V
a
n
d
e
r
W
a
a
l
s
1st IE Increa
sing
The atomic radius
Decreases, due to the increase in nuclear charge but similar amount of shielding
Melting point
1st increase: due to the increasing strength of the metallic bond. There are more delocalised
electrons that hold the structure together.…read more

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Unit 1 chemistry revision : chem 1 ©
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Displayed formula Shows every atom as well as all bonds present
Homologous series A series of organic compounds that have a the same general
formula, similar properties and functional group
Functional group The reactive group attached to a compound.…read more

Comments

James

Great resource. :)

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