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12 Cards in this Set
- Front
- Back
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on the periodic table vertically are.....what is this clasification used for?
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groups/families.....# of electrons on the outer level
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horizontally on the periodic table is_____....what is this clasification used for?
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periods....number of energy levels.
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look at your periodic table.....how many levels are there for #45-Rh...How many electrons are on the outer level
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5levels 9 elctrons on the outer level...
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to find the number if neutrons if you have the atomic mass you ???
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You subtract the atomic number from the atomic mass
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PRotons is the same thing as?
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Atomic numbers
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When you add your Protons and your neutrons you get___
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YOur atomic mass
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Isotopes are________
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atoms of the same element with a different number of neutrons
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Periodic means...give examples
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Repeating in pattern
days of the week monthes of the year |
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Demetri Mendeleev
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came up with a way to organize the elements into a table in order of increasing atomic mass and discovered a pattern
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Henry mosley
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arranged them using atomic number instead of mass. we currently use this table
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The number of electrons in the outer level
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determine the chemical property of an element...
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elecrtron dot diagram-
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uses the symbol of the element and dots to represent the electrons in the outer levels
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