Atoms & Periodic Table Vocabulary

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Across
  1. 1. Property of the elements that can be predicted from the arrangement of the periodic table
  2. 4. The average mass of all the isotopes of an element or the sum of protons and neutrons in an atom
  3. 6. A negatively charged ion; gained valence electrons
  4. 9. The 14 elements with atomic numbers from 90 to 103
  5. 10. A positively charged ion; lost valence electrons
  6. 11. The 14 elements with atomic numbers from 58 to 71
  7. 12. A region of an atom in which electrons of the same energy are likely to be found; represented by periods on periodic table
  8. 13. The arrangement of electrons in the orbitals of an atom
  9. 14. Electrons on the outermost energy level of an atom; involved in ion formation and chemical bonding
Down
  1. 2. Elements with atomic numbers greater than 92
  2. 3. An atom or group of atoms that has a positive or negative charge because they lost or gained electrons
  3. 5. The amount of energy required to remove an electron from an atom
  4. 7. Atoms of the same element that have different numbers of neutrons; different atomic mass
  5. 8. A region around the nucleus of an atom where electrons are likely to be found