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The elements of group 1 The elements of group 2 The elements of the D block The elements of the F-block The elements of the S and P block The elements of group 17 The elements of group 18 The vertical columns of the periodic table The horizontal rows of the periodic table An atom with an atomic number larger than 106 A reaction that affects the nucleus Half the distance from center to center of two like atoms bonded together The energy required to remove an electron from an atom A measure of the ability of an atom to attract electrons in a chemical bond There is a repeating pattern of physical and chemical properties when the elements are organized by atomic number An electron found in the outermost energy level of an atom The reduction of the attractive force from the nucleus due to the cancellation of the attraction by the inner shell electrons. A solid of liquid mixture of two or more metals What was the main organizational pattern for Mendeleev’s periodic table? What did he do next in the organization of the periodic table? What did he do with his table that helped solidify him as the father of the modern periodic table? How reactive are the alkali metals and why do they react that way? How reactive are the alkaline earth metals and why do they react that way? How reactive are the halogens and why do they react that way? How reactive are the noble gases and why do they react that way? What atomic property affects the properties of radius, ionization energy, and electronegativity most while going down the group? Across the period? What is the trend for Ionization energy down the group and why? Across the period and why? What is the trend for electronegativity down the group and why? Across the period and why? What is the trend for atomic radius down the group and why? Across the period and why? Where do scientist believe all of the naturally occurring elements were/are formed? How have those elements been spread throughout the universe? What element was the first one to be created synthetically? Ho do scientists create new elements? Why can a cyclotron no longer be used and what device replaced it? How do newly formed elements get their names? Element Group Sr Pu Co S Mg Rn Zr Period Block Met/Non V.E. Which element in each of the following pairs has the smallest radius Rb or Na Na or Cl Rb or Cl Which element in each of the following pairs has the largest ionization energy Ba or Mg Mg or P Ba or P Which element in each of the following pairs has the smallest electronegativity Cs or K K or Cu Cs or Cu