structure of the atom 2
TRANSCRIPT
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Structure of the Atom
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The Atom The atom is the smallest part of any element that
retains all of the properties of that element. The atom is made up of:
protons (+)electrons (-)neutrons (0)
The central core of the atom is called the nucleus, containing protons and neutrons. (Nucleus charge = +)
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The Atom
PROTONS
# protons = atomic #
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The Atom
ELECTRONS
# electrons = # protons
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The Atom
NEUTRONS
# neutrons = atomic mass -
atomic #
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In your notebook, determine the number of protons, electrons, and neutrons for the following elements:
Oxygen Argon Magnesium Neon Nitrogen Chlorine
Protons Neutrons Electrons
8 8 8
18 22 18
12 12 12
10 10 10
7 7 7
17 18 17
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The Atom
The electrons are located in energy levels around the nucleus.
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Electron Fill Rule (2-8-8 rule) Electrons fill energy levels as follows
– First Energy Level = 2 electrons– Second Energy Level = 8 electrons– Third Energy Level = 8 electrons
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Let’s Practice
Oxygen Argon Magnesium Neon Nitrogen Chlorine
http://www.chemicalelements.com/