Physical Science

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Across
  1. 4. fixed shape; variable volume
  2. 7. a base would turn red litmus paper _______
  3. 9. the most abundant gas in Earth's atmosphere
  4. 10. D = 50g/10Ml
  5. 11. any substance that is represented by an atomic symbol on the periodic table
  6. 12. anything that has mass and takes up space
  7. 13. the vertical lines of the periodic table
  8. 14. neutral or no charge particle
  9. 18. if the number of electrons in an element change, it is considered an __________
  10. 20. family with (Ca) Calcium in it
  11. 23. if an element has less electrons than it would in a neutral atom, the charge is ____________.
  12. 24. two or more elements combined in a set ratio that can only be separated by chemical means
  13. 27. the second most abundant gas in Earth's atmosphere
  14. 28. fixed volume; fixed shape
  15. 29. Density = Mass/__________
  16. 30. positively charged particle
Down
  1. 1. how many valence electrons does (He) Helium have?
  2. 2. 19 is (K) potassium's
  3. 3. this pH is considered to be neutral
  4. 5. bananas, pencils, chairs, and the earth all consist of_________
  5. 6. a match burning is considered a _________ change
  6. 8. negatively charged particle
  7. 13. the most metallic element on the periodic table
  8. 15. if an element has more electrons than it would in a neutral atom, the charge is ____________.
  9. 16. combined items that can be separated by physical means
  10. 17. cutting a person's hair is considered a _________ change
  11. 19. fixed volume; variable shape
  12. 21. if the number of neutrons in an atom change, it is considered an ___________ if that element
  13. 22. the horizontal lines of the periodic table
  14. 25. how much "stuff" is in something
  15. 26. how many neutrons in a neutral atom of (Li) Lithium Atomic Number 3?