Chapter 5: The Periodic Law

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