vocabulary

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Across
  1. 2. result
  2. 4. mass/neutrons plus the protons
  3. 7. modest or low view of ones own importance humbleness
  4. 9. electrons/outer most electrons
  5. 10. attention
  6. 12. clouds/where the electrons
  7. 14. a change
  8. 17. vigorous or determined attempt
  9. 18. of conservation of mass/the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed
  10. 19. trend/specific patterns that are present in the periodic table
  11. 20. number/number of protons and electrons
  12. 21. formula/expression
Down
  1. 1. multiplier or factor that measures some property
  2. 2. period/row,horizontal
  3. 3. change/have a dramatically different appearance even though the chemical composition of the substance remains unchanged
  4. 5. but nonmetal at the same time,zig zag line
  5. 6. of being honest and having strong moral principles
  6. 8. combined
  7. 10. reactive
  8. 11. change/a change of chemical reaction
  9. 13. gas/last group and not reactive
  10. 15. particle
  11. 16. metals/1st group,more reactive