The periodic table

  • Created by: Char
  • Created on: 15-05-13 17:07
Who proposed the law of octaves?
Newlands
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How many elements were there?
62
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Scientists did not accept his ideas because...
Properties did not match very well within groups
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Who produced a better table (in 1869)?
Mendeleev
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Why was it better?
He left gaps for undiscovered elements
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What determines the element's place in periodic table?
Atomic number
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How can we explain trends of reactivity in periodic table?
Distance between outermost electrons and nucleus
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Another way?
Number of occupied inner shells (energy levels)
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As atoms get larger...
The outer electrons are less strongly attracted by the nucleus
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Other cards in this set

Card 2

Front

How many elements were there?

Back

62

Card 3

Front

Scientists did not accept his ideas because...

Back

Preview of the front of card 3

Card 4

Front

Who produced a better table (in 1869)?

Back

Preview of the front of card 4

Card 5

Front

Why was it better?

Back

Preview of the front of card 5
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