Chapter 3 and 4 Science

  1. Atomic Mass
    average mass of an atom of an element; its unit of measure is the atomic mass unit (u), which is 1/12 the mass of a carbon-12
  2. Atomic Number
    number of protons in the nucleus of each atom of a given element; is the top number in the periodic table
  3. Compound
    a substance produced when elements combine and whos properties are different from each of the elements in it
  4. Element
    natural or synthetic material that cannot be broken down into simpler materials by ordinary means; has unique properties and is generally classified as a metal, metalloid, or nonmetal
  5. Isotope
    two or more atoms of the same element that have different numbers of neutrons in their nuclei
  6. Mass Number
    sum of the number of protons and neutrons in the nucleus of an atom
  7. Matter
    anything that takes up space and has mass
  8. Metal
    element that is malleable, ductile, a good conductor of electricity, and generally has a shiny or metallic luster
  9. Metalloid
    element that has charactisics of both metals and nonmetals and is solid at room temperature
  10. Mixture
    a combination of compounds and elements that has not formed a new substance and whose proportions can be changed without changing the mixture's identity
  11. Nonmetals
    elements that are usually gases or brittle solids and poor conductors of electricity and hear; are the basis of the chemicals of life
  12. Substance
    matter with a fixed composition whose identity can be changed by chemical processes but not by ordinary physical processes
  13. Condensation
    change of matter from a gas to a liquid state
  14. Gas
    matter that does not have a difinite shape or volume; has particles that move at high speeds in all directions
  15. Liquid
    matter with a definite volume but no definite shape that can flow from one place to another
  16. Solid
    matter with a definite shape and volume; has tightly packed particles that move mainly by vibrating
  17. Surface Tension
    the uneven forces acting on the particles on the surface of a liquid
  18. Vaporization
    change of matter from a liquid state to a gas
  19. Viscosity
    a liquid's resistance to flow
Card Set
Chapter 3 and 4 Science
ch 3-4 Science