Unit 2 Make Up Assignment

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Across
  1. 3. Positive particle that identifies an element
  2. 4. These electrons are in the outermost shells in the electron cloud
  3. 6. Elements in the same _____ have the same number of energy levels; these move left to right in the periodic table
  4. 8. The ability an atom has to undergo or have a chemical reaction
  5. 9. The law of conservation says that the mass of reactants and the mass of products remain the
Down
  1. 1. Elements in the same _____ have the same number of energy levels; these move left to right in the periodic table
  2. 2. Evidence of this type of reaction includes temperature change, bubbling, residue, etc.
  3. 5. The elements on the left side of a chemical equation
  4. 6. Evidence of this type of reaction includes boiling, freezing and melting
  5. 7. Elements in the same ______ have similar chemical properties and the same number of valence electrons