The Periodic Table

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Across
  1. 2. the number of groups on the periodic table
  2. 6. the second person to make a periodic table and organized the elements by atomic number
  3. 11. the elements in Group 2 of the periodic table (beryllium, magnesium, calcium, strontium, barium, and radium)
  4. 12. an atom, radical, or molecule that has or lost one or more electrons and has a negative or positive charge
  5. 14. glucose and chlorophyll are examples of ___________
  6. 17. a vertical column of elements in the periodic table; they share chemical properties
  7. 19. the elements in Group 1 of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium)
  8. 21. groups of similar elements that go vertically by columns; there are 18 of them
  9. 22. the element that has only the element that has one proton and one electron and it does not behave like any other element
Down
  1. 1. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  2. 3. elements in group 1 form ____________ ions
  3. 4. a horizontal row of elements in the periodic table
  4. 5. the elements in Group 17 of the periodic table (fluorine, chlorine, bromine, iodine, and astatine);they combine with most metals to from salts
  5. 7. metals that can use the inner shell before using the outer shell to bond; all positive
  6. 8. loosing and gaining electrons
  7. 9. an element that conducts heat and electricity poorly and that does not form positive ions in an electrolytic solution
  8. 10. an element or compound that conducts electric current better than an insulator does but not as well as a conductor does
  9. 13. the elements in Group 18 of the periodic table (helium, neon, argon, krypton, xenon, and radon);they are nonreactive because they are stable
  10. 14. the name of group 14
  11. 15. elements in group 17 form _____________ ions
  12. 16. number of periods on the periodic table
  13. 18. an element that is shiny and that conducts heat and electricity well
  14. 20. the man who created the first periodic table of elements in 1869 and arranged the elements by atomic mass