Chapter 5: The Periodic Law

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