History of an Atom
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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| show | Early Greeks, Democritus
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| First believed atoms were indivisible. | show 🗑
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| show | The Early Greeks, Democritus
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| show | John Dalton
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| show | John Dalton
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| first beleived Atoms of the same element are alike and atoms of different elements are different. | show 🗑
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| show | John Dalton
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| show | All matter is made of atoms which are indivisible and indestructible; Atoms cannot be destroyed
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| show | Atomic Theory
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| Difference between Dalton and Early Greek's theories: | show 🗑
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| created the "plum pudding model" | show 🗑
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| thought an atom is a ball of positive charge with negatively charged particles (like the chips in chocolate chip cookie dough) | show 🗑
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| show | J.J. Thompson
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| show | Ernest Rutherford
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| show | Ernest Rutherford
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| Thompson to Rutherford: what's the same? | show 🗑
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| Thompson to Rutherford: what's different? | show 🗑
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| show | Neils Bohr
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| show | Bohr
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| theorized An atom has a small, positively-charged nucleus (containing protons and neutrons) surrounded by a large region where there are as many negatively-charged electrons as there are protons in the nucleus. | show 🗑
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| theorized The electrons do not move around the atom in a definite path, but whiz around it in different directions. While there are regions where electrons are more likely to be found (called energy levels or orbitals,) it is impossible to determine the | show 🗑
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| theorized The electrons go around the nucleus and each electron spins as it moves, like the earth spins. | show 🗑
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| show | Both discuss the proton/neutron attractions. Both refer to electron orbits as “energy levels”.
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| Bohr to the Modern Model: What's different? | show 🗑
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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:
ElizabethI
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