Holly's quiz 1

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Author:
BrieMK
ID:
259460
Filename:
Holly's quiz 1
Updated:
2014-01-31 14:33:52
Tags:
Radiology
Folders:
Hollys class
Description:
LAST SEMESTER! WOOHOOO!
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  1. What is matter?
    Matter is anything that has mass and occupies space
  2. The quantity of matter contained in a substance describes
    mass
  3. What is the unit of mass?
    Kg
  4. The force that an object exerts under gravity describes
    weight
  5. A _____ is the smallest particle of a compound possessing characteristics of the compound
    Molecule
  6. _________ are materials that have a definite and constant composition
    Substances
  7. Substances are made up of
    elements and compounds
  8. ___________ are simple substances that cannot be broken down
    Elements
  9. How many naturally occurring elements are there?
    92
  10. What is the smallest piece of an element?
    An atom
  11. ____________ are complex substances with two or more elements
    Compounds
  12. What is the smallest piece of a compound and give an example?
    A molecule ex. salt
  13. The ancient Greeks believed in
    specific elements, atoms, air, water, earth and fire
  14. Who was the first person to separate the elements based on mass and when?
    Dalton in early 1800's
  15. Who developed the periodic table of elements and organized them by ascending mass and chemical properties?
    Mendeleev
  16. Who theorized that there was a small dense nucleus surrounded by a cloud of electrons and when?
    Rutherford in 1911
  17. Who theorized that an atom was arranged like a solar system, a dense nucleus surrounded by electrons in distinct orbits and when?
    Bohr in 1913

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