Atoms and Periodic Table

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Across
  1. 3. not likely to give away
  2. 7. a positive electric charge, in the nucleus of the atom
  3. 8. A simple substance that cannot be broken down into smaller parts or changed into another substance
  4. 11. a group of electrons circulating around a nucleus or molecule
  5. 12. the number of protons in the nucleus of the atom
  6. 13. emitting or relating to the emission of ionizing radiation or particles
  7. 14. something that isnt metal
  8. 16. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
  9. 17. the fixed amount of energy that something has
  10. 20. any of the elements in group 0 of the periodic table
  11. 21. a substance made by mixing other substances together
  12. 23. elements in group 2 of the periodic table
  13. 25. the small dense region consisting of protons and neutrons at the center of an atom
  14. 26. any of the elements occupying group 17 on the periodic table
  15. 28. an element whose properties are between metal and nonmetals
  16. 30. a unit mass used to express atomic and molecular weights
  17. 32. a table of chemical elements arranged in order of atomic number
  18. 33. a column in the periodic table
Down
  1. 1. the total number of protons and neutrons in a nucleus
  2. 2. the horizontal rows of the periodic table
  3. 4. the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic level
  4. 5. elements in groups 3-12 on the periodic table
  5. 6. an electron in the outer shell,associated with an atom
  6. 9. the property of subatomic particles that cause it to experience a force when placed in an electric and magnetic field
  7. 10. the recurrence of properties of the elements
  8. 15. no electric charge, in the nucleus of the atom
  9. 18. a negative electric charge, around the nucleus of the atom
  10. 19. any of the metals in group 1 of the periodic table
  11. 22. each of two or more forms of the same element that contain equal number of protons but different number of neutrons in the nuclei
  12. 24. a solid material that is typically hard, shiny, malleable, fusible, and ductile
  13. 27. the minimum charge possible, which charge of an electron
  14. 29. the basic unit of a chemical element
  15. 31. a substance formed from two or more elements