Name ______________________________________________ Date _________ Period ______
Origins of the Periodic Table
1.
Match the scientist below with their contribution to the periodic table:
a. Dmitri Mendeleev
b. John Newlands
c. Henry Moseley
d. J.W. Dobereiner
_____ i.
Arranged elements by atomic number.
_____ ii.
Grouped elements into sets of 3 called triads.
_____ iii.
Arranged elements by atomic mass
_____ iv.
Grouped elements into repeating sets of 8, called octaves.
2.
Explain how the triad of beryllium, magnesium, and calcium can be used to show
Dobereiner’s idea of average properties.
3.
Mendeleev’s table contained empty spaces for undiscovered elements. How did the
discovery of those elements help support Mendeleev’s arrangement of the periodic table?
4.
What is the periodic law?
5.
What is the major difference between Mendeleev’s table and Moseley’s table? Find an
element on the table that would be placed in different spots on both tables.
6.
What are other names for the rows and columns on the periodic table?
7.
What is an oxidation state? What determines an element’s oxidation state?