Unit 2: Chem Vocab

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Across
  1. 2. no definite shape or volume
  2. 4. a change of state from a liquid to a solid by losing energy, exothermic
  3. 7. _____ property - a property of matter that describes a substance’s ability to change into new matter that has different properties
  4. 12. change of _______ the change from one physical state to another
  5. 14. number - the number of protons in an atom of an element.
  6. 15. _______ change- a change of matter from one form to another without a change in chemical properties
  7. 17. ______ Law states that the volume of gas is inversely proportional to the pressure of a gas at a constant temperature.
  8. 19. Number - the sum of the protons and neutrons of an atom.
  9. 21. a measure of the gravitational force exerted on an object
  10. 22. a definite shape and volume
  11. 23. The center region of an atom. Where most of an atom’s mass is located.
  12. 24. a negatively charged particle that occupies the space in an atom outside the nucleus.
  13. 25. _____ change - when one or more substances are changed into new substances that have new or different properties
  14. 26. the ratio of the mass of a substance to the volume of the substance
  15. 27. a positively charged particle inside the nucleus of an atom.
Down
  1. 1. anything that has mass and takes up space
  2. 3. definite volume but not a definite shape; liquid takes the shape of its container
  3. 5. the change of state in which a solid becomes a liquid by adding energy, endothermic
  4. 6. the amount of matter in an object
  5. 8. the fourth state of matter, ionized gas
  6. 9. ________ Law states that the volume of gas is directly proportional to the temperature of a gas when the pressure is constant
  7. 10. a measure of the movement of particles; how much thermal energy something has
  8. 11. an atom that is not neutral because it has gained or lost an electron; it has a charge.
  9. 13. the amount of space taken up, or occupied by an object
  10. 15. a characteristic of a substance that does not involve a chemical change, such as density, color, or hardness.
  11. 16. the smallest piece of an element that still represents that element.
  12. 18. the process in which a solid changes directly into a gas, endothermic change
  13. 20. a neutral particle in the nucleus of an atom.