Are metallic f-block elements with atomic numbers 58-71 of the Periodic Table of Elements. Nonmetals
Lanthanides
Metalloids
Transition metals
Actinides

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

What are the major types of a chemical compound

What is the rate law for the uncatalyzed reaction?