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CELL BIOLOGY1,2,3
WHAT WE ARE MADE OF (JOB OF MOLECULES (Physical…
CELL BIOLOGY1,2,3
WHAT WE ARE MADE OF
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ISOMERISATION
Isomers- Compounds possessing the same molecular formula but with their atoms arranged in different ways
-Show differences in physical and chemical properties,
although they are members of the same homologous series
Structural isomers
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Same homologous series
(e.g. Butane C4H10,
methylpropane C4H10)
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Chemical Substances
Elements
=Substance that cannot be split into any simpler substance.
=Smallest particle of an element is an atom
Atom
=Elements consist of large number of the same type of atem
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Molecule
=Two or more atoms chemically united together to form the smallest part of a chemical substance that can exist by itself.
The Atom
Nucleus
-Protons (+charge)
-Neutrons (neutral charge)
Electrons (-charge)
Therefore overall charge= neutral
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Bonding
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Hydrogen Bonds
-Weak chemical bonds
=A hydrogen atom covalently bonded to one electronegative atom is attracted to another electronegative atom.
-H and O, H and N
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