STAAR Grade 8 Science: Matter and Energy 1: Atoms and Molecules

Vocabulary.com's STAAR Grade 8 Science lists cover many of the essential terms and concepts that you'll be expected to know on test day. Boost your confidence and your test score by mastering these important words.
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Full list of words from this list:

words only definitions & notes
  1. atom
    the smallest component of an element
  2. chemical
    material produced by changes in atoms or molecules
  3. compound
    a substance formed by chemical union of two or more elements
  4. electron
    an elementary particle with negative charge
  5. element
    a substance that cannot be separated into simpler substances
  6. formula
    a symbolic representation of the composition of a compound
  7. mass
    the property of a body that causes it to have weight
  8. molecule
    the simplest structural unit of an element or compound
  9. neutron
    a subatomic particle with zero charge
  10. nucleus
    the positively charged dense center of an atom
  11. organic
    relating to chemical compounds having a carbon basis
  12. particle
    a body having finite mass but negligible dimensions
  13. proton
    a stable particle with positive charge
  14. valence electron
    an electron in the outer shell of an atom which can combine with other atoms to form molecules
Created on 六月 15, 2021 (updated 六月 16, 2021)

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