Chemistry Ch 2 Vocab

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Across
  1. 5. a substance that is made up of only one kind of particle
  2. 9. the energy of motion
  3. 10. a measurement of the total amount of thermal energy transferred from one substance to another
  4. 12. a physical change directly from the gaseous state to the solid state
  5. 13. the physical law that applies to natural processes unaffected by outside manipulation by any intelligence and states that during any energy transformation, some energy goes to an unusable form
  6. 14. any property of matter that can be observed or measured without altering its chemical composition
  7. 15. a number that appears in front of a chemical formula and indicates how many atoms, ions, molecules, or formula units are present
  8. 16. a distinct group of two or more atoms covalently bonded together
  9. 20. the physical law stating that during ordinary physical and chemical processes, mass is neither created or destroyed, only converted from one form to another
Down
  1. 1. the same throughout
  2. 2. the theoretical temperature at which all particle motion ceases
  3. 3. pertaining to a chemical process that releases heat energy and produces a negative change in enthalpy
  4. 4. a state of matter matter in which particles have enough energy to partially overcome the attractive forces and conforms to the shape of its container, has a fixed volume, and is nearly incompressible
  5. 6. the physical law stating that it is impossible to reach absolute zero
  6. 7. a pure substance that consists of atoms of different elements chemically bonded together
  7. 8. a physical change from the liquid state to the vapor or gaseous state
  8. 11. a change in the identity of material that results in a different material with a different composition and properties
  9. 17. anything that occupies space and has mass
  10. 18. a physical change from the liquid state to the solid state
  11. 19. a state of matter in which the particles have enough energy to overcome the attractive forces having no definite shape or size and is highly compressible
  12. 21. a pure substance whose atoms all have the same atomic number and cannot be broken down by chemical processes into a more stable and simpler form