Unit B

12345678910111213141516171819202122232425
Across
  1. 3. Chemical combination pf two or more elements in a specific ratio
  2. 6. Change of state from a solid to a gas or form a gas to a solid
  3. 9. Energy stored in a chemical and release when chemical react
  4. 11. Made up of 2 or more substance combined together
  5. 12. When two or more substance reacts to create a different substance
  6. 13. of one atom of an element calculated from the total number of protons
  7. 16. Group 2 in the periodic table
  8. 21. An experiment in which all reactants and all products of a chemical reaction are accounted for
  9. 22. Description of how a substance interacts with other substances
  10. 24. Positively charged particles in the nucleus of an atom
  11. 25. measure of atomic mass; 1 amuis equal to 1/12th the mass of a carbon 12 atom
Down
  1. 1. Smallest part of the element, made up of nucleus containing protons and neutron
  2. 2. Substance made of only one kind of matter, which has a unique sets of properties
  3. 4. Anything that has mass and occupies space
  4. 5. gases Group 18 elements in the periodic table
  5. 7. Group 1 element in the periodic table, not including hydrogen
  6. 8. Combination of symbols that represent a compound
  7. 10. Element that has both metallic and non-metallic properties
  8. 14. Refers to the tree common states in which matter can exist: solid liquid and gas
  9. 15. A reaction that takes place when 2 or more substance react to form a new substance
  10. 17. Colorless,Odorless gas
  11. 18. Organic molecules made up of atoms of carbon, hydrogen and oxygen
  12. 19. Characteristics that can be used to describe a substance
  13. 20. dull, brittle element that does not conduct electricity
  14. 23. Substance that helps s chemical reaction to proceed more quickly