The Periodic Table Webquest Page 4

f. What states of matter do halogens exist in at room temperature?

__________________________________

19. Click on Noble Gases (left bar) and answer these questions.

a. What is the group number? _________________

b. Why were these gases considered to be inert or stable? ________________________

c. What is their oxidation number? ____________________

20. Click on Rare Earth Elements ( Inner Transition) (left bar) and answer these questions.

a. On you periodic table, label the Lanthanide and Actinide series with your pencil.

b. How many Rare Earth elements are there? ___________________________

c. Define trans-uranium. ___________________________________

d. The Rare Earth metals are found in group _______________and periods ______________and

_______________.

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