Periodic table crossword

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Across
  1. 3. An element which is typically brittle
  2. 6. The law that the properties of the elements are periodic functions of their atomic numbers
  3. 8. A negatively charged ion
  4. 11. The measure of the size of atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons
  5. 12. An atom or molecule describes the minimum amount of energy required to remove an electron (to infinity) from the atom or molecule in the gaseous state
  6. 15. The name of the first group in the periodic table
  7. 17. Classified as metals, nonmetals, and metalloids
  8. 18. The energy it takes to remove an electron from an atom that is neutral
  9. 20. The name of a row on the periodic table
  10. 22. The energy it takes to remove an electron from an 2+ion
  11. 23. An element which is ductile and malleable
Down
  1. 1. A chemical property that describes the tendency of an atom or a functional group to attract electrons (or electron density) towards itself
  2. 2. The name of a column on the periodic table
  3. 4. Good conductors of Heat and Electricity
  4. 5. The energy it takes to remove an electron from a 1+ ion
  5. 7. The radius exhibited by an ion in an ionic crystal where the ions are packed together to a point where their outermost electronic orbitals are in contact with each other
  6. 9. A positively charged ion
  7. 10. An electron that is in the highest occupied energy level of an atom
  8. 13. An atom or bonded group of atoms with a positive or negative charge
  9. 14. The amount of energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion
  10. 16. An element whose properties are in between Metals and Nonmetals
  11. 19. Is the number of protons in an atom
  12. 21. The total number of protons and neutrons in an atom