Chapter 5: The Periodic Law

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Across
  1. 4. One-half the distance between the nuclei of identical atoms that are bonded together.
  2. 7. Element that has the largest atomic radius.
  3. 8. An atom or group of bonded atoms that has a positive or negative charge.
  4. 11. Any process that results in the formation of an ion.
  5. 12. An arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column, or group.
  6. 17. A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
  7. 18. A negative ion.
  8. 19. devised the periodic table in which the elements were arranged in increasing order of nuclear charge.
  9. 22. Group 2, consists of Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).
  10. 23. Group 17, consists of Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At).
  11. 27. The electrons of the outer shell which are available to be lost, gained, or shared in the formation of chemical compounds.
  12. 30. Metals Group 1, consists of Hydrogen (H), Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
Down
  1. 1. Element that is the most electronegative.
  2. 2. The physical and chemical properties of the elements are periodic functions of their atomic numbers.
  3. 3. The energy change that occurs when an electron is acquired by a neutral atom.
  4. 5. The energy required to remove one electron from a neutral atom of an element.
  5. 6. devised the periodic classification of the chemical elements, in which the elements were arranged in order of increasing atomic weight.
  6. 9. The 14 elements with atomic numbers from 58 (Cerium, Ce) to 71 (Lutetium, Lu)
  7. 10. A positive ion.
  8. 13. The 14 elements with atomic numbers from 90 (Thorium, Th) to 103 (Lawrencium, Lr)
  9. 14. The s-block and p-block elements together are called.
  10. 15. Block that contains the elements in Group 1 and Group 2.
  11. 16. Appearing or occurring at intervals.
  12. 20. Consists of the elements in Groups 3-12.
  13. 21. Block that contains the elements in Groups 13-18.
  14. 24. A general direction in which something is developing or changing.
  15. 25. Element that has the smallest atomic radius.
  16. 26. Group 18, consists of Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).
  17. 28. Block that contains the elements of Lanthanides and Actinides.
  18. 29. Block that contains the elements in Groups 3-12.