Balancing Chemical Equations

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Across
  1. 4. In a chemical equation the transition from the original compounds to the result after the reaction is represented using an _____________.
  2. 5. A __________ is a number placed in front of a chemical formula in an equation that tells you the amount of a reactant or product that takes part in a reaction.
  3. 8. of Conservation of Mass The ________________________ states that matter cannot be created or destroyed.
  4. 10. A chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust is called ___________.
  5. 11. A change in _______ is also a sign of a chemical change.
  6. 12. ______________ is a chemical reaction in which compounds combine into more complex substances.
  7. 14. _______________ is a type of chemical reaction in which elements react with a compound and take the place of another element in that compound.
  8. 16. A _____________ is a combination of two or more of the same elements.
  9. 17. ___________ is a condition in which different elements are equal or in the correct proportions.
  10. 19. A __________ is a solid that forms from liquids during a chemical reaction.
  11. 23. Reaction In an ____________ reaction energy from the reaction is released usually in the form of heat because the energy released as the products form is greater than the energy required to break the bonds of the reactants.
  12. 24. An equation in pure word form with no elemental symbols or numbers is called a ________ equation.
  13. 25. A physical substance in general, that which occupies space is referred to as ___________.
  14. 26. A pure substance that is made of one type of atom is referred to as an ___________.
  15. 27. The way that elements are stated in an equation is known as ___________.
Down
  1. 1. A substance made of two or more atoms of different elements chemically combined is known as a ___________.
  2. 2. Model __________ __________ is the theory that chemical reactions are the result of collisions between molecules that are strong enough to break bonds in the reactants, resulting in a rearrangement of atoms to form a product or products.
  3. 3. Reaction In an _____________ reaction energy is absorbed from matter nearby because more energy is required to break the bonds of the reactants than is released by the formation of the products.
  4. 6. Equation- A chemical equation in which the sum of atoms in the product or products does not equal the sum of atoms in the reactants is an ___________ ___________.
  5. 7. System In a _________ _________ matter cannot enter or leave and it occurs in a sealed; airtight container.
  6. 9. A type of chemical reaction in which compounds split into simpler substances is known as ____________.
  7. 13. sign The compounds that are part of the reactants and the products in a chemical equation separated from each other in a chemical equation by a _________ __________.
  8. 15. Production Another way in which a chemical reactions is shown is ____________. This can also be found in the formation of bubbles.
  9. 18. ________ are the numbers found underneath element symbols to show ratio of a certain element to others in a compound.
  10. 19. The _________ is the result of the reaction that took place.
  11. 20. Equation A method of showing a chemical reaction using symbols instead of words is called a ___________ ____________.
  12. 21. Change A change in state, shape, & size, in which no new substance is formed is known as a ____________.
  13. 22. A _________ is a substance that takes part in and undergoes change during a reaction.
  14. 28. The amount of a product produced by a chemical reaction compared to the amount of reactant is called the __________.
  15. 29. System- In an _________ ________ matter can enter and escape into the surroundings.