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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Atom |
Smallest particle of an element |
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Dalton's Atomic Theory |
Elements are composed of atoms. Atoms of the same element are identical. Atoms of different elements can mix physically or chemically. Chemical reaction occurs when aroms are seperated, joined, or rearranged |
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Electrons |
Negatively charged subatomic particles |
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Cathode Ray |
A glowing beam that travled from the cathode to the anode |
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Protons |
Positively charged subatomic particles |
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Neutrons |
No charged subatomic particles |
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Nucleus |
The core of an atom, composed of protons and neutrons |
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Atomic Number |
The number of protons of an element |
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Mass Number |
The total number of protons and neutrons |
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Isotopes |
Atoms with the same number of protons but different number of neutrons |
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Atomic Mass Unit (amu) |
Is one of the twelfth of the mass of a carbon-12 atom |
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Atomic Mass |
A weighted average mass of the atoms in a naturally occurring sample of an element |
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Periodic Table |
An arrangement of all the elements, seperating them into their properties |
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Period |
Horizontal row of the periodic table |
↔ |
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Group |
Vertical column of the periodic table |
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