it14spr101.20dc2t1 2 3.txt

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Author:
aphy101
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257181
Filename:
it14spr101.20dc2t1 2 3.txt
Updated:
2014-01-18 08:31:21
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profmwinston
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ch2topic1,2,3
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  1. ´╗┐Anything that has weight and takes up space is called what?
    Matter
  2. What is the study of the composition of structures and how they change?
    Chemistry
  3. What is the study of chemistry in living organisms?
    Biochemistry
  4. Fundamental substances that comprise all matter; composed of atoms? (ex: iron, copper, silver, gold, aluminum, carbon, hydrogen, and oxygen)
    Elements
  5. Chemical combinations of elements are called what?
    Compounds
  6. This type of element is needed by the body in large amounts. (ex: carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus)
    Bulk Elements
  7. This type of element is needed by the body in small amounts; used by the body for parts of enzymes.
    Trace Elements
  8. This type of element is needed by the body in very small amounts; can be toxic in large amounts.
    Ultratrace Elements
  9. This is the smallest particle of an element; composed of protons, neutrons, and electrons.
    Atom
  10. What is formed when atoms combine with other atoms?
    Chemical Bond
  11. The central portion of an atom; contains protons and usually neutrons.
    Nucleus
  12. What subatomic particle carries a single negative charge?
    Electron
  13. What subatomic particle carries a single positive charge?
    Proton
  14. What subatomic particle carries no charge?
    Neutron
  15. The number of protons in the nucleus of an atom; also equal to the number of electrons.
    Atomic Number
  16. The number of protons plus the number of neutrons in an atom. (electrons do not count.)
    Atomic Weight
  17. Atoms that have the same atomic numbers but different atomic weights are called what?
    Isotopes

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