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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| First had the idea that matter is made of tiny particles called atoms. | show 🗑
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| show | Early Greeks, Democritus
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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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| show | John Dalton
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| Frist Beleived Atoms of different elements can combine to form chemical compounds. | show 🗑
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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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| First thought Atoms contain smaller particles—electrons | show 🗑
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| Performed the "gold foilexperiment" | show 🗑
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| First theorized that the positive charge in an atom is found in a small particle (nucleus) which is surrounded by a large area of empty space. | show 🗑
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| show | Both agreed that atom’s consisted of positively and negatively charged particles. Both agreed that atoms of different elements can combine to form compounds. Both agreed that atoms of the same compound are the same, and atoms of different compounds are di
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| show | Rutherford says that electrons orbit around the nucleus ; he also explains the relative sizes of the parts of an atom
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| show | Neils Bohr
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| helped determine where the orbits are located. | show 🗑
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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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| Bohr to Modern Model: what;s the same? | show 🗑
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| Bohr to the Modern Model: What's different? | show 🗑
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Created by:
ElizabethI
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