Full of Hot Air (An Exploration in Air Volume and Density) #5139

This is a discussion for the Full of Hot Air experiment. Feel free to connect with the Learning Team here, or to discuss experiment tips, ask questions, leave comments or suggest experiment variations here.

Q: Using the Periodic Table of Elements, what is the atomic number of nitrogen?
A: 7

Q: Which element has the atomic number of 18?
A: Argon