The Periodic Law: Fact or Fiction
Before reading: Place a check mark to the left of each statement you think is true.
Read: Modern Chemistry: Chapter 5 sections 1-3
During or After Reading: Add new check mark or cross out check marks if you
change your mind about a statement. Use the space under each statement to note
the page, column, and paragraph(s) where you have found the information to
support your thinking.
__________ 1. The periodic table is an alphabetical chart of elements
originally developed by Henry Mosley, in 1869.
__________ 2. Periodic mean repeating pattern. An example of a repeating
pattern is the days off the week.
__________ 3. Dimitri Mendeleev observed that chemical properties of
elements repeated when elements were arranged by atomic
__________ 4. The Periodic Law explains why the moon has phases, and how
water waves move.
__________ 5. The modern Periodic table arranges elements by atomic mass.
__________ 6. The noble gas family of elements was added to the periodic
table in 1900.
__________ 7. The lanthanides and actinides elements can be found all over
the periodic table.
Nobel Laureate (20 points Research Scientist (18 Lab technician (15 Trainee (0-8 points
Thorough justification Some justification Some justification Some justification
provided for all provided for all provided for b provided for a few
responses. responses responses responses