Chapter 5: The Periodic Law

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