it14spr101.20cc2t1 2 3.txt

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apgroupcspring2014
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it14spr101.20cc2t1 2 3.txt
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2014-01-17 12:34:00
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  1. ´╗┐Anything that takes up space and has weight and is composed of elements.
    matter
  2. The science that systematically studies the composition, properties, and activity of organic and inorganic substances and various elementary forms of matter.
    Chemistry
  3. The branch of science concerned with the chemical and physicochemical processes that occur within living organisms.
    Biochemistry
  4. What are the fundamental substances that all matter is composed of?
    Elements
  5. A substance that is formed when two or more chemical elements are chemically bonded together.
    Compounds
  6. These elements make up 95% (by weight) of the human body?
    bulk elements
  7. Elements required in small amounts by an organism to maintain proper physical functioning?
    Trace elements
  8. A chemical element that normally comprises less than one microgram per gram of a given organism and plays a significant role in its metabolism?
    ultratrace elements
  9. The particles that elements are composed of?
    Atoms
  10. Attractions that are formed when atoms combine with atoms like themselves or with other atoms?
    Chemical bonds
  11. What is the central portion of an atom that contains the protons and neutrons?
    Nucleus
  12. What constantly moves around the nucleus and carries a single negative electrical charge?
    Electrons
  13. What is found in the nucleus and carries a single positive electrical charge?
    Protons
  14. This remains electrically neutral (uncharged) and is found in the nucleus?
    Neutrons
  15. This is made up by adding the number of protons in the nucleus of one atom?
    atomic number
  16. The number of protons plus the number of neutrons in one atom make up this?
    Atomic weight
  17. Atoms that have the same atomic number but have different atomic weights are called?
    isotopes

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