Science 8 ch 4

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  1. Ductile material
    can be pulled out, or drawn into a long wire
  2. Physical properties of metals
    • shininess
    • ductility
    • malleability
    • conductivity
  3. Malleable
    Can be hammered or rolled into flat sheets and other shapes
  4. Number of protons equals number of _________
  5. Elements in a row of the periodic table
    have properties that change in a pattern from left to right
  6. The elements in a column of the periodic table
    have similar characteristics
  7. Mendeleev's periodic table was arranged by
    Atomic mass
  8. Periodic table rows are called
  9. Periodic table columns are called
  10. Modern periodic table is arranged by
    atomic number
  11. 2 most common alkali earth metals
    • magnesium
    • calcium
  12. Characteristics of alkaline earth metals
    • hard
    • gray white
    • good conductor of electricity
  13. Transition metals
    • Hard and shiny
    • Good conductor of electricity
    • Form colorful compounds
    • Familiar metals such as gold silver iron copper and nickel
  14. Carbon is able to bond with atoms of other elements in many different ways because
    it has 4 valance electrons
  15. All living things contain what element
  16. What form of carbon is so hard it could be used for cutting tools?
  17. Another name for carbon compound
  18. The atomic number of an element is based on the
    number if of protons in the nucleus
  19. Which part of the atom move around the nucleus?
  20. Why do scientists use models to describe atoms
    because they are so small
  21. Metals are NOT
    liquid at room temperature
  22. In the periodic table, where are most metals found
    in Group 1 - the first column to the left
  23. To make most synthetic elements, scientists use powerful machines called
    particle accelerators
  24. Which group contains the most elements
  25. What info in the period table indicates the number of protons in an atom
    atomic number
  26. Mixed Metals
    Groups 13 - 15
  27. Lanthanides
    • Top row that is pulled out
    • Used in alloys
  28. Actinides
    • Bottom row that is pulled out
    • Very unstable
    • Use particle accelerator to crash and combine
  29. Non metal
    • Poor conductor
    • Dull and brittle
    • Opposite of metals
    • usually gain or share electrons
  30. Halogens
    • gains or shares one electron
    • salt forming
    • most reactive non metals
    • uncombined elements are harmful
  31. Inert/Noble Gases
    • Group 18
    • full outer shell of electrons
    • Will not gain or lose
    • unreactive
    • Do not combine or form compounds
  32. Hydrogen
    • 90% of all atoms in universe are hydrogen
    • On earth found combined with oxygen in form of water
    • located to left of zig zag but NON metal
    • 1 proton 0 neutrons and 1 electron
  33. Semi metals/metalloids
    • located along zigzag
    • have some properties of metals and nonmetals
    • varying ability to conduct electricity
Card Set
Science 8 ch 4
Science 8 ch 4 elements and periodic table
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