Get started!
Stage 1
Answer 5 questions correctly in a row.
The model below represents a molecule of carbon tetrachloride. Carbon tetrachloride was once used in fire extinguishers. It is no longer used because it is poisonous.

C
Cl
Complete the statement.
Carbon tetrachloride
an elementary substance
a compound
ref_doc_title.
Jumping to stage 1 of 1
Excellent!
Now entering the Challenge Zone—are you ready?

