Chemistry Chapter 5

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farzamtheillest
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273690
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Chemistry Chapter 5
Updated:
2014-05-07 22:50:36
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Science
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Chemistry Chapter 5 May 5, 2014
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  1. Atom
    A small particle made from electrons, protons and nuetrons in which elements are made of.
  2. Electron
    • A stable subatomic particle with a charge of
    • negative electricity found atoms.
  3. Subatomic particle
    Any particle below the size of an atom.
  4. Nucleus
    • The nucleus is the region consisting
    • of protons and neutrons at the center of an atom.
  5. Proton
    • A stable subatomic particle occurring in all
    • atomic nuclei, with a positive electric charge.
  6. Neutron
    A subatomic particle of about the same mass as a proton but without any electric charge.
  7. Energy levels
    A possible level of energy that an electron can have.
  8. Mass number
    The total mass of an atom.
  9. Isotope
    Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in the nuclei.
  10. Bohr-Rutherford Diagram
    A model of the atom in which a positive nucleus of protons and neutrons is surrounded by electrons in different energy levels.
  11. Atomic Mass
    The average mass of the most common isotopes of an element.
  12. Periodic table
    A table of the elements arranged inorder of atomic number.
  13. Metal
    An element that is hard, ductile, malleable, and a good conductor of heat and electricity. Found on the left side of the periodic table.
  14. Non-Metal
    Element that is not shiny, malleable, and is apoor conductor of heat and electricity. Found on right side of the periodic table.
  15. Metalloid
    An element which has properties that are intermediate between those of metals and solid non-metals or semiconductors.
  16. Period
    A horizontal row of elements in the periodictable
  17. Group
    A vertical column of elements in the periodictable
  18. Alkali Metal
    Any of the elements lithium, sodium, potassium,rubidium, caesium, and francium, occupying Group 1 of the periodic table.
  19. Alkaline earth metal
    Any of the elements beryllium, magnesium,calcium, strontium, barium, and radium, in Group 2 of the periodictable. They are reactive, electropositive, divalent metals, and form basicoxides.
  20. Halogens
    • Any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group 17 of the periodic table. They are
    • reactive non-metallic elements which form strongly acidic compounds.
  21. Noble Gases
    Any of a group of gases that includehelium, neon, argon, krypton, xenon, and usually radon and that exhibit greatstability and extremely low reaction rates.
  22. Valence electron
    Electrons or a electron in the outer shell of an atom that is responsible for the chemicalproperties of the atom.

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