Atoms & Periodic Table (Ch. 4 & 5)

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Across
  1. 3. The possible energy that electrons in an atom can have
  2. 8. An atom of a given element that has a different number of neutrons and different mass number
  3. 14. A unique number for each element that equals the number of protons in an atom of that element
  4. 19. The positively charged subatomic particles that are found in the nucleus of an atom
  5. 20. Visual models of the most likely locations for the electrons in an atom
  6. 21. An element that is a good conductor of heat and electricity
  7. 22. An arrangement of elements in columns based on a set of properties that repeat from row to row
  8. 23. Elements that form a bridge between elements on the left & right sides of the period table
  9. 24. The elements in group 7A of the periodic table
  10. 25. The negatively charged subatomic particles that are found in the space outside the nucleus of an atom
Down
  1. 1. The arrangement of electrons in the orbitals of an atom
  2. 2. The neutral subatomic particles that are found in the nucleus of an atom
  3. 4. Rows of elements in a periodic table
  4. 5. Electrons that are in the outermost energy level of an atom
  5. 6. The pattern of repeating properties displayed by elements in the periodic table
  6. 7. Elements in group 1A of the periodic table not including hydrogen
  7. 9. Regions of space around the nucleus where an electron is likely to be found
  8. 10. An element with properties that fall between those of metals & nonmetals
  9. 11. An element that is a poor conductor of heat & electricity
  10. 12. The dense positively charged mass located in the center of an atom
  11. 13. Columns of elements in a period table
  12. 15. The elements in this group don't react with any other element
  13. 16. The sum of the number of protons & neutrons in the nucleus of an atom
  14. 17. Elements in group 2A of the periodic table
  15. 18. The average mass number of all of the isotopes of an element on Earth