Chemical Reactions - Reactants to Products

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Across
  1. 3. During an endothermic reaction, energy is taken i___ from the surroundings.
  2. 5. When we mix two chemicals together, we say that this has occurred.
  3. 6. The symbol for oxygen is O2. We say that oxygen has two a________ of oxygen.
  4. 8. These are made from the reactants in a chemical reaction.
Down
  1. 1. During every chemical reaction, this is given out to or taken in from the surroundings.
  2. 2. We react two or more of these together to end up with products.
  3. 4. What holds two atoms of hydrogen (H2) together? Chemical _________.
  4. 7. When a chemical reaction occurs, old bonds b______ and new bonds are made.