"Well, you won't know unless you try, right? One time, I soaked iron in a strong acid, and there was a huge explosion. It almost destroyed the entire building."
"You're lucky to be alive."
Shiao Yi asked that while placing his hand on his forehead. Maybe he was getting a headache?
"Well, most of my experiments are dangerous, so I usually put up a simple barrier around myself. That way, I'm fine."
"...I see. The gas released during that reaction is called hydrogen. It can explode if it mixes with air, so you must keep it away from flames."
"Hydrogen?"
"It's the element with atomic number 1 and is represented by the letter H. Also, when you burn niter and sulfur, you get sulfuric acid. H₂SO₄. It's a deadly substance."
"Wait! Wait! Let me write that down! Paper, paper—pen and ink—notes, notes!"
Aaron quickly spread paper across the table and began scribbling down what Shiao Yi just said.
"Okay, so how do you write H?"
