Answer:
riodic Table
A museum wants to store their valuable documents in cases that contain a gas that will protect the documents.
She should not choose one of the other gases because they are too
The museum director should choose
Explanation:
I didn't understand
Answer:
I can :) just comment lol
It appears that they might be labeled "Hidden" in the properties of that file. Right Click on Properties and Uncheckmark Hidden<span />