Science vocabulary Chemistry

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Across
  1. 6. pure substance formed when at least one metal and one non-metal combine.
  2. 7. new substance produced in a chemical reaction.
  3. 10. amount of mass in a given volume of a substance.
  4. 11. Mass of one atom of an element calculated from the total number of protons,neutrons, and electrons of that atom
  5. 14. a chemical reaction that absorbs energy.
  6. 18. homogeneous mixture; mixture of two or more pure substances that look like one substance.
  7. 20. Invisible negatively charged particle that orbits the nucleus of an atom.
  8. 22. table in which the elements are organized by their physical and chemical properties.
  9. 23. cloudy mixture in which tiny particles of one substance are held within another, and the particles can be separated out.
  10. 25. pure substance that cannot be broken down into other substances; substance made up of only one type of atom
  11. 26. an experiment in which one or more products of a chemical reaction can escape.
Down
  1. 1. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy.
  2. 2. how easily a substance can be stretched into wire.
  3. 3. element that has both metallic and nonmetallic properties.
  4. 4. neutral particle in the nucleus of an atom.
  5. 5. principle that matter is not created or destroyed in a chemical reaction; the mass of the products always equals the mass of the reactants
  6. 8. chemical combination of two or more elements in a specific ratio
  7. 9. Measure of atomic mass.
  8. 12. description of how a substance interacts with other substances, such as acids;chemical properties are observable only when achemical change occurs
  9. 13. change that results when two or more substances react to create a different substance.
  10. 15. change of state from solid to liquid.
  11. 16. Group 1 elements in the periodic table, not including hydrogen.
  12. 17. brittle element that does not conduct electricity.
  13. 19. substance that helps a chemical reaction to proceed more quickly.
  14. 21. group 18 elements in the periodic table; the most stable and unreactive elements.
  15. 24. atom that has become electrically charged because it has lost or gained electrons; a positive ion is an atom that has lost one or more electrons;a negative ion is an atom that has gained one or more electrons