The Periodic Table

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Across
  1. 4. trend of ionization energy down a group.
  2. 7. elements found in group 17 of the periodic table that readily gain one electron to form -1 ions.
  3. 8. a vertical column of elements in the periodic table that share chemical properties.
  4. 9. trend of ionic radii down a group.
  5. 12. trend of electronegativity from left to right of the periodic table.
  6. 14. it is a measure of an atom's attraction for an electron when the atom is bonded to another atom.
  7. 15. it pertains to the half of the distance from center to center of two like atoms that are bonded together.
  8. 17. he was an English chemist who arranged the known elements at his time in order of increasing atomic mass. He noticed that all of the elements in a given row had similar chemical and physical properties every eight elements.
  9. 19. any of the elements that have atomic numbers from 89-103.
  10. 20. a horizontal row of elements in the periodic table.
  11. 24. trend of ionic radii across a period.
  12. 25. he arranged the periodic table according to order of increasing atomic number by studying the X-ray spectra of 38 different elements.
  13. 27. it is a measure of the ability of an atom in a chemical compound to attract electrons.
  14. 29. elements found in Groups 3 to 12 of the periodic table. They are characterized by the presence of partially filled d-orbitals, which gives them unique chemical and physical properties like variable oxidation states, colored compounds, and catalytic abilities.
  15. 30. These are patterns in elements on the periodic table due to the similarity in atomic structure of the elements in the group/families or period.
  16. 31. an unreactive element Group 18 of the periodic table that has eight electrons in its outer level.
  17. 33. the law that states that the repeating physical and chemical properties of elements change periodically with their atomic number.
  18. 34. the most electronegative element among the group 7A elements.
Down
  1. 1. the reduction of the attractive force between a positively charged nucleus and its outermost electrons due to cancellation of some of the positive charge by the negative charges of the inner electrons.
  2. 2. a member of the rare-earth series of elements, whose atomic numbers range from 58-71.
  3. 3. an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties.
  4. 5. the energy required to remove an electron from an atom or ion.
  5. 6. the most electronegative element among the group 3A.
  6. 10. trend of electronegativity down a group.
  7. 11. elements found in Group 1 of the periodic table, excluding hydrogen. They are highly reactive, soft, and have one electron in their outermost shell, which makes them eager to lose that electron and form +1 ions.
  8. 13. an element in the s-block or p-block of the periodic table.
  9. 16. what was the basis of Henry Moseley in the organization of the periodic table.
  10. 18. element associated with 1s^2 2s^1
  11. 21. elements found in Group 2 of the periodic table. These elements have two electrons in their outermost shell, which they readily lose to form +2 ions.
  12. 22. when elements were arranged in increasing order of atomic mass, every eighth element exhibited similar properties, much like the notes in a music.
  13. 23. trend of ionization energy from left to right of the periodic table.
  14. 26. element found in group 2A, period 4.
  15. 28. this states that the repeating physical and chemical properties of elements change periodically with their atomic number.
  16. 32. a solid or liquid mixture of two or more metals.