Development of the periodic table 1.3

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9 Terms

1
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Robert Boyle

Elements, Boyle Law-V=P/k

2
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Lavoisier

Law of conservation mass-matter is neither created nor destroyed in a chemical reaction but rearranged

3
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Davy

Discovered new elements-Na Ca K using electrolysis

4
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Dalton

Atomic theory-elements made of tiny particles, indestructible, identical

5
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Dobereiner

Triads-groups of three elements with similar properties, middle one is intermediate

6
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Newlands

Law of octaves-properties repeat every eighth element

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Mendeleev

Periodic table-arranged by property, left gaps

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Moseley

Atomic number-number of protons in an atom

9
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Modern table vs Mendeleev

No gaps, noble gases, transition elements in separate block, in order by atomic number