C3.1 Introducing chemical reactions

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Across
  1. 3. molecule containing two atoms
  2. 6. when a reactant is present in an amount greater than that needed to react with the other reactant
  3. 8. a type of reaction in which a precipitate forms
  4. 10. a type of chemical equation that models the change that happens to one reactant in a reaction
  5. 13. an ion formed when a group of atoms loses of gains electrons
  6. 16. a charged particle present in a reaction mixture, but that does not take part in the reaction
  7. 20. a model for a reaction showing formulae and number of units for all substances involved. The numbers of each atom are the same on both sides of the equation
  8. 21. an insoluble product in the solid state, formed during a reaction involving solutions
  9. 22. the number of entities in one mole, equal to the number of atoms in 12.0 g of 12C atoms, 6.02 × 1023
Down
  1. 1. a type of chemical equation that models how oppositely charged ions form an ionic compound
  2. 2. amount of substance that contains the same number of particles (6.02 × 1023) as there are atoms in 12.0 g of 12C
  3. 4. the principle that states that the total mass stays the same during a chemical reaction, because atoms are not created or destroyed during a chemical reaction
  4. 5. a model of a reaction that describes reactants and products using their chemical names
  5. 7. apparatus in which substances can enter or leave the reaction mixture during a reaction
  6. 9. letters used to represent the physical state of a substance (g, gas; l, liquid; s, solid; aq, dissolved in water)
  7. 11. apparatus in which substances cannot enter or leave the reaction mixture during a reaction
  8. 12. blue paper changes to red in acidic solution, and red paper turns to blue in an alkaline solution
  9. 14. a description of a compound or an element that uses symbols for atoms, and numbers to show the actual number of atoms of each element in a molecule
  10. 15. a reactant present in an amount less that that needed to react completely with the other reactant in a chemical reaction
  11. 17. the mass in grams of one mole of a substance
  12. 18. describes the relative amounts of each substance involved in a chemical reaction
  13. 19. alkaline calcium hydroxide solution. It turns cloudy white in the presence of carbon dioxide