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Structures and Bonding…read more

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The structure of the atom
The Ancient Greeks used to believe that
everything was made up of very small particles. I
did some experiments in 1808 that proved this
and called these particles ATOMS:
Dalton
ELECTRON ­
negative, mass
nearly nothing
NEUTRON ­ PROTON ­
neutral, same positive, same
mass as proton mass as
("1") neutron ("1")…read more

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Mass and atomic number
Particle Relative Mass Relative Charge
Proton 1 1
Neutron 1 0
Electron 0 -1
MASS NUMBER = number of
protons + number of neutrons
SYMBOL
PROTON NUMBER = number of
protons (obviously)…read more

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Mass and atomic number
How many protons, neutrons and electrons?…read more

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Electron structure
Consider an atom of Potassium:
Nucleus
Potassium has 19 electrons.
These are arranged in shells...
The inner shell has __ electrons
The next shell has __ electrons
The next shell has __ electrons Electron structure
The next shell has the remaining __ electron = 2,8,8,1…read more

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