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16 Cards in this Set
- Front
- Back
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nucleus
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the center part of an atom, surronded my the electron cloud
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proton
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an atomic particle in the nucleus that has a positive charge
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neutron
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particle in the nucleus with no charge
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energy level
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how electrons are arranged at different distance from the nucleus
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electron
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negative particle that does not travel in well- defined or bits
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electron cloud
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the area of space around the nucleus where electrons travel
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atomic theory
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set of ideas that explain the structure of the atom
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periodic table
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a chart of chemical elements in order of atomic number of elements in groups of common traits in the same area
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groups
families |
colunms in the periodic table
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periods
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hortizonal rows
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metals
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elements characterized by physical properties such as shiniers, malleability, ductility, and conductivity
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metalliods
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an element that has properties of metals and non metals
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non-metals
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an element that lacks property of a metal
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noble gases
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elements that do not combine with other elements
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isotope
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same # of protons, different
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Mendeleev
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a scientist who discovered the periodic table
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