8th grade semester exam review

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Across
  1. 2. number of protons in an atom
  2. 5. bond formed when 2 elements share electrons
  3. 7. element found in group 17 of the periodic table
  4. 9. the way a mineral reflects light from its surface (shines)
  5. 10. gradual wearing away of a metal element
  6. 13. anything that has mass and takes up space
  7. 15. a characteristic of a substance that describes its ability to change into different substance
  8. 16. a change that alters the form or appearance of a material but does not make the material into another substance
  9. 18. a state of matter with no definite shape but a definite volume
  10. 20. tiny, negatively charged particle that moves around the outside of the nucleu
  11. 22. the basic particle from which all elements are made
  12. 24. atom or group of atoms that has become electrically charged
Down
  1. 1. one or two letter representation of an element
  2. 3. measure of the force of gravity on an object
  3. 4. liquid's resistance to flow
  4. 5. a substance made of two or more elements chemically combined in a specific way or proportion
  5. 6. electrons in the highest energy level and involved in chemical reactions
  6. 8. small particle in the nucleus of an atom with no charge
  7. 11. elements in the same vertical column of the periodic table
  8. 12. state of matter that has definite shape and volume
  9. 14. state of matter with no definite shape or volume
  10. 17. small, positively charge particles that are found in the nucleus of an atom
  11. 19. the measurement of how much mass of a substance is contained in a given volume
  12. 21. the study of the properties and how matter changes
  13. 23. the measure of ho much matter is in an object