Into what 4 blocks can the periodic table be divided? s, p, d, f Name the following groups of elements in the periodic table and state what type of element they are: Group 1 Alkali Metals - Metals Group 2 Alkaline Earth Metals - Metals Groups 3-12 Transition Metals - Metals Group 17 Halogens – Non-Metals Group 18 Noble Gases – Non-Metalsĥ What determines the length of each period in the periodic table?

Noble Gases, Lanthanides, Actinides Why are elements’ atomic masses not in strict increasing order, even though the properties of the elements are similar? Periodic Table is arranged by atomic # and some masses are out of order because they are weighted average of the isotopes. Who established atomic numbers as the basis for organizing the periodic table? Henry Moseleyģ Name 3 sets of elements that were added to the periodic table after Mendeleev’s time? The physical and chemical properties of the elements are periodic functions of their atomic numbers. Who is credited with developing a method that led to the determination of standard relative atomic masses? Stanislao Cannizzaro Who discovered the periodic law and what is it? Dimitri Mendeleev. 1 Chapter 5 Notes Crash Course Chemistry - Periodic Table

Crash course periodic table chemistry