chem ch 5

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jessica_h
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311984
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chem ch 5
Updated:
2015-11-23 20:30:54
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chem
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chem
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chem
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  1. atom
    smallest particle of an element that retains the identity of the element
  2. electron
    negatively charged particle within the atom
  3. subatomic particle
    a particle that is smaller than the atom
  4. nucleus
    in chemistry, the positively charged centre of the atom
  5. proton
    positively charged particle that is part of every atomic nucleus
  6. neutron
    an uncharged particle that is part of almost every atomic nucleus
  7. atomic number
    the number of protons in the nucleus of an atom
  8. mass number
    the sum of the number of protons and the number of neutrons in the nucleus of an atom
  9. isotope
    one of two or more forms of an element that have the same number of protons but a different number of neutrons
  10. atomic mass
    average mass of the naturally occurring idoyoprd of an element
  11. periodic table
    a system for organizing the elements into columns and rows, so that elements with similar properties are in the same column
  12. metal
    typically, an element that is hard, shiny, malleable, and ductile, and is a good conductor of heat and electricity
  13. non-metal
    typically, an element that is not shiny, malleable, or ductile, and is a poor conductor of heat and electricity
  14. metalloid
    an element that shares some properties with metals and some properties with non-metals
  15. period
    a horizontal row of elements in the periodic table
  16. group
    a vertical column of elements in the periodic table
  17. valence electron
    an electron in the outermost occupied energy level of an atom

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