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Medical Chemistry 1 > Historical Development of the Periodic Table > Flashcards

Historical Development of the Periodic Table Flashcards

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1
Q

What is the Law of Triads?

A

The middle element has properties that are an average of the other 2 members of the triad.

Johann Wolfgang Dobereiner 1817

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2
Q

What is the Law of the Octaves?

A

Elements are arranged in increasing order of their atomic masses, the properties of the eighth element are similar to that of the first

  • John Newlands, 1864
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3
Q

How did Dmitri Mendeleev arrange the elements?

A
  • Properties of elements are periodic (repeating) according to the atomic mass
  • Dmitri Ivanovich Mendeleev 1869
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4
Q

How did Henry Moseley rearrange the periodic table in 1913?

A

Properties of elements are periodic (repeating) according to the atomic number

  • Henry Moseley, 1913
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Medical Chemistry 1 (9 decks)

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