Term
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Definition
- (John Newland)
- elements in a given row have similar properties that repeat every eight elements.
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Term
Problems w/Mendeleev's Periodic Table
- (How many elements are included?)
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Definition
- contained gaps
- elements weren't in order of atomic mass
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Term
Henry Mosely's Way to Arrange Elements
- (What else did he create?)
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Definition
By atomic number, not atomic mass
- (the modern definition of atomic number)
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Term
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Definition
| Elements are arranged by thier atomic #s and elements with similiar properties occur regularly |
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Term
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Definition
| Electrons in the last energy level |
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Term
group (two other names)
- (what do they have in common?)
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Definition
family/column
- (the same number of valence electrons)
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Term
period (two other names?)
- (what do they have in common?)
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Definition
series/row
- (same number of occupied energy levels)
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Term
(Order of scientists who have made contributions to the periodic table?)
What did each do? |
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Definition
Newland (law of octaves)
Mendeleev (arranged into table by atomic mass)
Mosely (rearranged by atomic number) |
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Term
| (how many natrual elements?) |
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Definition
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