Ch. 4 Review
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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| atom | smallest particle of an element that retains its identity in a chemical reaction
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| Democritus's Atomic Philosophy | believed that atoms were indivisible and indestructible
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| Dalton Atomic Theory | transformed Democritus's ideas on atoms into a scientific theory
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| Thomson | discovered the electron.
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| electrons | are negatively charged subatomic particles
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| Ernest Rutherford | proposed that the atom is mostly empty space, thus explaining the lack of deflection of most of the alpha particles
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| nucleus | is the tiny central core of an atom and is composed of protons and neutrons
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| mass number | total number of protons and neutrons in an atom
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| atomic number | is the number of protons in the nucleus of an atom of that element
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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.
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.
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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