Science Term 2

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Across
  1. 1. Two or more atoms bonded together
  2. 3. Number Number of protons in an atom's nucleus
  3. 5. An atom with a positive or negative charge
  4. 6. The center of an atom
  5. 11. Outer shell electrons involved in bonding
  6. 12. Group 1 elements in the periodic table
  7. 13. Elements that are good conductors of heat and electricity
  8. 16. A particle in the nucleus with no charge
  9. 17. Gas Group 18 elements known for their lack of reactivity
  10. 19. Atoms of the same element with different numbers of neutrons
  11. 21. Mass Total number of protons and neutrons in an atom
  12. 22. A positively charged particle in the nucleus
  13. 24. Elements with properties of both metals and nonmetals
Down
  1. 2. Substance made of two or more different elements
  2. 4. Metal Elements found in groups 3-12 of the periodic table
  3. 7. A pure substance consisting of one type of atom
  4. 8. Energy levels where electrons are found
  5. 9. Table Chart organizing all known elements
  6. 10. A negatively charged particle orbiting the nucleus
  7. 14. Configuration Distribution of electrons in an atom's shells
  8. 15. Elements that are poor conductors of heat and electricity
  9. 18. Group 17 elements in the periodic table
  10. 20. Horizontal rows in the periodic table
  11. 23. Vertical columns in the periodic table
  12. 25. The smallest unit of matter