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15 Cards in this Set
- Front
- Back
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set of abbriveations for the cheimical elements
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element symbol
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a given compound always contains elements in exactly in the same proportion by mass
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law of constant composition
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1:elements are made of atoms
2:atoms of an element are idenical 3:atoms of an element are different from those of any other element 4:atoms can combineed 5:atoms are invisible in the chemical process |
Dalton's atomic theory
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the fundemental unit of which elements are composed
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atom
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a substance with constant compostition that can be broken down into elements by chemical prosess
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compound
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a representation of a molecule in which the symbols for the elements are used to indicate the types of atoms present and subscript are used to show the reative number of atoms
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chemical formula
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a negative charged partical that occupies the space around the nucleus of an atom
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electrons
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the modern concept of the atom as having a dense cente4r of positive charge and electrons mobing around the outside
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nuclear atom
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the small, dense center pf positive charge in an aton
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nucleus
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a positivley charged particle in an atomic nucleus
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proton
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nuclei that contain nuetral particles
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nuetron
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atoms of the same element that have different numbers of nuetrons. They have idenical atomic number but different mass numbers
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isotopes
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the number of protons in the nucleus of and atom, each element had a uniquie atomic number
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atomic number
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the total number of protons and nuetrons in the atomic nucleus of and aton
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mass number
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a chart showing al the elements arranged in columns in such a way that all the elements in a given column exhibit similar chemical properties
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periodic table
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