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9345123
Elements
Description
Concept Map
No tags specified
atoms and elements
chemistry
gcse
Mind Map by
Shaun Brown
, updated more than 1 year ago
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Created by
Shaun Brown
about 7 years ago
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Resource summary
Elements
Annotations:
Elements
Are substances which
cannot be broken down by chemical means to simpler form
Are particles which
ATOMS
Are the smallest physical units of chemical identity
Were initially a philosophical concept
Made plausible by
Daltons Automic Theory
Were shown by Rutherford,s 1911 experiment
to be
mostly empty space
in which
negative charge is spread throughout the atomic volume
shown later to contain
ELECTRONS
most of the mass is concentrated in a tiny NUCLEUS carrying a possitive charge
charge defines
Atomic numbers
which together characterise a particular
NUCLIDE
nuclides with the same atomic number are known as
ISOTOPES
whose abundances determine the
additional mass due to
NEUTRONS
which number
92 in Nature
characterised by experimentaly observed
Distinctive Properties
Abundance Profiles
Relative Masses (Atomic Weights)
leading to
Atomic weight scale
whose units are
Unified Atomic Mass Units
Isotopic Composition
as observed by
Mass Spectrometry
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