Chemistry Glossary Terms - Chapter 5

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ReneeF
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288452
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Chemistry Glossary Terms - Chapter 5
Updated:
2014-11-07 12:10:42
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Chemistry
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Description:
Grade 9 Science Chemistry Terms - Chapter 2 of 3
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  1. Atom
    def: the smallest particle of an element that retains the identity of the element
  2. Electron
    def: a negatively charged particle within the atom
  3. Subatomic Particle
    def: a particle that is smaller than the atom
  4. Nucleus
    def: in chemistry, the positively charged centre of the atom
  5. Proton
    def: a positively charged particle that is part of every atomic nucleus
  6. Neutron
    def: an uncharged particle that is part of almost every atomic nucleus
  7. Energy Levels
    def: possible levels of energy an electron can have in an atom
  8. Atomic Number
    def: the number of protons in the nucleus of an atom
  9. Mass Number
    def: the sum of the number of protons and the number of neutrons in the nucleus of an atom
  10. Isotope
    def: one of two or more forms of an element that have the same number of protons but a different number of neutrons
  11. Bohr-Rutherford Diagram
    def:
  12. Atomic Mass
    def: the average mass of the naturally occurring isotopes of an element
  13. Periodic Table
    def: a system for organizing the elements into columns and rows, so that element with similar properties are in the same column
  14. Metal
    def: typically, an element that is hard, shiny, malleable, and ductile, and is a good conductor of heat and electricity
  15. Non-metal
    def: typically, an element that is not shiny, malleable, or ductile, and is a poor conductor of heat and electricity
  16. Metalloids
    def: elements that share some properties with metals and some properties with non-metals
  17. Period
    def: a horizontal row of elements in the periodic table
  18. Group
    def: a vertical column of elements in the periodic table
  19. Alkali Metal
    def:
  20. Alkaline Earth Metal
    def:
  21. Halogens
    def:
  22. Noble Gases
    def:
  23. Valence Electron
    def: an electron in the outermost occupied energy level of an atom

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