Chapter 5: The Periodic Law

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