Books on Atoms are on the non-fiction shelves at 539 and States of Matter are around 530
Essays, videos, diagrams, definitions, biographies, and experiments. Includes extensive activities and experiments bank which may be filtered by discipline, time and number of participants.
There are also Crash Course videos on Gasses - which you can explore by simply Googling the terms "Crash Course Gases"
View videos on Atoms and States of Matter in the links below