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15 Cards in this Set

  • Front
  • Back
set of abbriveations for the cheimical elements
element symbol
a given compound always contains elements in exactly in the same proportion by mass
law of constant composition
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
the fundemental unit of which elements are composed
a substance with constant compostition that can be broken down into elements by chemical prosess
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
chemical formula
a negative charged partical that occupies the space around the nucleus of an atom
the modern concept of the atom as having a dense cente4r of positive charge and electrons mobing around the outside
nuclear atom
the small, dense center pf positive charge in an aton
a positivley charged particle in an atomic nucleus
nuclei that contain nuetral particles
atoms of the same element that have different numbers of nuetrons. They have idenical atomic number but different mass numbers
the number of protons in the nucleus of and atom, each element had a uniquie atomic number
atomic number
the total number of protons and nuetrons in the atomic nucleus of and aton
mass number
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
periodic table