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13 Cards in this Set
- Front
- Back
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What kind of charge do electrons have?
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negative
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Charge Protons have
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positive
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Charge neutrons have
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no charge
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What's a nucleus made of
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Neutrons and protons
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4 parts of an atom
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protons neutron electrons electron cloud
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who created the PTE did people approve and where was he from?
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Dmitri Mendeleev no Germany
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what are columns called and what are columns
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families groups go up and down
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what are the 2 rows at the bottom of the periodic table called
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Lanthanides and Actinides
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why r the lanthanides and actinides broken out
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share properties of the scandium family but need to be in atomic # order
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2 organization rules of PTE
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organized by atomic # and elements with the same property are in the same column
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what 7 things do you know looking at an element box
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# of neutrons, # of electrons, # of protons, atomic #, atomic mass, element name element abrieviation
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what happens if you take away a neutron
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it becomes an isotope and has a +1 charge
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How do you ge the average # of neutrons
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Atomic # - Atomic mass
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