a. What is the halogen group number? ___________________
b. Are halogens metals or nonmetals? ______________________
c. The term “halogen” means ____________________ and compounds containing halogens are
d. How many electrons are in their outer shell? __________________
e. What is their oxidation number? ______________________
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