Atoms and Elements

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Across
  1. 2. Gaining electron=negative charge;becomes an
  2. 4. Full outer shell=
  3. 6. (+) and neutron (0) Inside nucleus
  4. 7. electrons ...determine chemical properties
  5. 10. Varieties of atoms are called
  6. 12. Elements bond together in various ways to form
  7. 13. and electrons Stabel atoms have equal numbers of
  8. 14. Losing electron=positive charge;becomes
  9. 15. stable Not full outer shell=
  10. 17. and chemical properties All elements have their own unique
  11. 18. Horizontal Rows=
  12. 20. Gas =Most Nonreactive and known as Inert
Down
  1. 1. eight eighteen rule In order, electron shells are filled following the
  2. 2. All matter is made of
  3. 3. and nitrogen Examples of elements:
  4. 5. number Since atoms are distinguished by the number of protons, the number of protons called the
  5. 8. (-) Surrounding orbitals
  6. 9. Table ...created by Mendeleev in 1869
  7. 10. ...determine physical and chemical properties
  8. 11. Vertical Columns=
  9. 16. or losing an electron ....results in an electrical charge
  10. 19. Electrons orbit the atomic nucleus in areas called