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24 Cards in this Set
- Front
- Back
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Matter |
Anything that has mass and occupies space. |
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Atom |
The smallest portion of an element. |
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Nucelus |
The center part of an atom that contains protons and neutrons. |
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Proton |
A particle in an atom found in the nucleus that has a positive electrical charge. |
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Neutron |
A particle in an atom found in the nucleus that has no electrical charge. |
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Electron |
A particle in an atom found in the nucleus that has a negative electrical charge. |
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Element |
Substance that can't be separated into a simpler substance, example: carbon, oxygen or gold. |
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Periodic table |
An orderly arrangement of elements based on their atomic numbers. |
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Atomic number |
An element's position in the periodic table based on (and equal to) the number of protons it has in its nucleus. |
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Isotopes |
Atoms of the same element that have different numbers of neutrons in the nucleus. |
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Atomic mass |
The mass contained in an element's nucleus, which is equal to the number of protons plus the number of neutrons. |
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Electron energy level |
The distance at which electrons travel around the nucleus. |
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Chemical compound |
A chemical compound of 2 or more atoms or elements. |
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Chemical reaction |
Process that occurs when 1 substance is changed into another. |
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Reactivity |
An element's ability or tendency to combine with another element. |
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Valence electrons |
The electrons found in the outer energy level of an atom. |
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Octet rule |
Tendency of atoms to gain, lose, or share electrons with other atoms in order to have 8 electrons in their outer energy level. |
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Chemical bond |
Attractive force between atoms that's formed when atoms transfer or share their electrons. |
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Electron dot diagram |
A diagram of an atom that represents its valence electrons as dots around the chemical symbol. |
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Chemical bond |
A connection made between atoms when electrons are attracted, shared, or transferred. |
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Ionic bond |
A bond formed when elements transfer (gain or lose) electrons. |
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Ion |
An electrically charged "atom" that has either gained/lost electrons. |
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Covalent Bond |
A bond formed when elements share electrons. |
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Organic compound |
Carbon containing compounds that make up living tissue. |
