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19 Cards in this Set
- Front
- Back
Dalton's Theory |
Theory that proposed that all matter is made up of individual particles called atoms, which cannot be divided. |
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Dalton's model of the atom |
Each type of atom is represented by a tiny, solid spheres with a different mass. |
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Thomson's model of the atom |
The model of the atom in which the negative charges are evenly scattered throughout a positively charged mass of matter (Plum Pudding, or Chocolate Chip Model). |
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Thomson's Experiment |
Glass tube experiment which provided evidence for subatomic particles. |
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Rutherford's Experiment |
Gold foil experiment that lead to the discovery of the nucleus. |
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Rutherford's model of the atom |
The model of the atom that proposed that all of the atom's positive charge is concentrated in its nucleus. |
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nucleus |
A dense, positively charged mass located in the center of the atom. |
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proton |
A positively charged subatomic particle found in the nucleus of an atom. |
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electron |
A negatively charged subatomic particle that is found in the space outside the nucleus of the atom. |
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neutron |
A neutrally charged subatomic particle that is found in the nucleus of the atom. |
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atomic number |
The number of protons in an atom of an element. |
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mass number |
The number of the protons and neutrons in the nucleus of an atom. |
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isotopes |
Atoms of the same element that have different numbers of neutrons and different mass numbers. |
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energy levels |
The possible energies that electrons in an atom can have. |
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electron cloud |
A visual model of the most likely locations of the electrons in an atom. |
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orbital |
A region of space around the nucleus where an electron is likely to be found. |
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electron configuration |
The arrangement of electrons in the orbitals of an atom. |
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ground state |
A condition in which all of the electrons in an atom have the lowest possible energies. |
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Bohr's model of the atom |
The model of the atom which focused on the arrangement of electrons around the nucleus. |