With the box experiment, you mention the flame at the top burns down until it "reaches the explosive limit within the chamber". What is that limit? How does that part work?
@@kellycarver2500 Helium is a basic chemical element and is a colorless gas known for its low density, low chemical reactivity and for being a great non-flammable substitute for hydrogen! Read more: www.madehow.com/Volume-4/Helium.html
