Chemistry Unit 5 Vocabulary

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Across
  1. 3. What's formed as the result of the reaction. The substance(s) to the right of the arrow in a chemical equation. Is there at the end of the chemical reaction.
  2. 5. A number below a number. We cannot change them. It is the number of atoms an element has. Be₄
  3. 8. A substance that has identical molecules with atoms with two or more chemical elements. H₂O is a compound.
  4. 9. Switches places with another element that is in a compound. Cl2(aq) + 2NaBr(aq) → 2NaCl(aq) + Br2(aq)
  5. 11. A molecule that has two atoms in its element. H₂
  6. 13. Hydrocarbon reacting with oxygen that releases carbon dioxide, heat and water. 2H₂(g)+O₂(g)→2H₂O(g)
Down
  1. 1. When one reactant breaks down into multiple, simpler products. ClNa→Cl+Na
  2. 2. Two reacting compounds that switch their bond buddy. AgNo₃+NaCl→AgCl+NaNO₃
  3. 4. A number placed in front of chemical formulas that is the number of molecules Combination Two or more elements that combine to make one product. Can also be called synthesis. 2CO(g)+O₂(g)→2CO₂(g)
  4. 6. A metal and a nonmetal bonded together chemically. NaF
  5. 7. A nonmetal and nonmetal bonded together chemically. N₂O₃
  6. 10. A substance that is changing during a reaction. The substance(s) to the left of the arrow in a chemical equation. Is there at the start of the chemical reaction.
  7. 12. An atom or molecule. When positively charged they are cations, and when negatively charged they are anions. (Na+) (O₂-)