V2 Module 3 and 4- Matter and Changes

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Across
  1. 4. A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
  2. 5. More energy is required to break the bonds of the reactants than is released when products form.
  3. 6. Law that states that energy is always transferring, but energy is not created or destroyed.
  4. 7. A small particle that is the building block of matter.
  5. 8. A process in which atoms of one or more substances rearrange to form one or more new substances.
  6. 10. A change in matter in which the substabnces that make up the matter change into other substances with different chemical and physical properties.
  7. 12. Matter with a composition that is always the same.
  8. 13. A number placed in front of an element symbol or chemical formula in an equation.
  9. 14. Two or more atoms that are held together by covalent bonds and act as a unit.
  10. 16. A starting substance in a chemical reaction.
  11. 18. A substance produced by a chemical reaction.
Down
  1. 1. A characteristic of matter that can be observed as it changes to a different type of matter.
  2. 2. The energy released when atoms form bonds.
  3. 3. Law that states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction.
  4. 9. A characteristic of matter that can be observed or measured without changing the identity of the matter.
  5. 11. A substance that consists of only one atom.
  6. 15. More energy is released when the products form than is required to break the bonds in the reactants.
  7. 17. A substance containing atoms of two or more different elements chemically bonded together.