Atomic structure study guide
-Atomic number
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Tells us the number of electrons
Tells us the number of protons
Arranged by increasing Atomic #
Is the smallest number. Usually above the symbol.
Tells us the identity of the element
-Atomic Mass
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Can help find the number of neutrons
Atomic mass= # of protons + # of neutrons
Electrons have no mass
The larger number. Usually found on the bottom if the symbol
-Protons, Neutrons, electrons
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Protons have a positive charge
Electrons have a negative charge
Neutrons have no charge
Know how to draw a model of an atom. Label: Protons, Neutrons, Electrons, Nucleus, and
Electron Shells
Protons Mass- 1 amu
Neutron mass-1 amu
Electron-0
Classified as subatomic particles
-Isotopes
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Different number of Neutrons
Same element
Different types of the same element (atomic mass is different)
3 isotopes of Carbon. Written C-12, C-13, C14
To find the number of Neutrons. # of Neutrons= Atomic Mass - # of Protons or
Atomic Mass- Atomic #
-Physical Properties
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Size Dependent, depends on size, (Weight, Mass, Volume)
Size independent, does not depend on size (Conductivity, Solubility, Boiling/freezing point,
Density
-Separating Mixtures
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Filtering
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Boiling point for miscible liquids (liquids that dissolve into each other) also called distillation
Pipette for Immiscible liquids (liquids that do not mix)
Magnetism
Density