Chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Democritus | if matter could be divided, it would not be able to put back together
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Aristotle | He thought that all matter was made up of a combination of his four elements.
This was proven wrong
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John Dalton (4 points) [English] "Billard Ball Model" | 1.All matter is made up of atoms which are invisible and indestructible
2.All atoms of a given element are identical in mass and properties
3.Compounds are formed by a combination of two or more different kinds of atoms
4.REARRANGEMENT
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Law of Conservation of Mass | the mass before = the mass after
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Law of Definite Proportions | atoms combine in whole ratios
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Law of Multiple Proportions | atoms can combine in many different ways
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J.J. Thomson [American] | he discovered electrons "Plum Pudding Model"
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Ernest Rutherford [Kiwi] | the majority of an atom is empty space but in the centre there is a positively charged very dense nucleus
-discovered the nucleus
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Neils Bohr [Danish] | each orbit holds few electrons
electrons can jump between orbits - go up but want to come back down
further the electron, the more energy it has
the frequency of lights is given off depending on which shell it came from
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
jakiday
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