
I'm number one! I'm number one! 1 H Hydrogen. 26 Fe. 8 0. Hydrogen is number one, but it's a lightweight. My little buddy and I are a solid important element. We even have an age named after us - the "Iron Age"? But we need to watch out for H2O molecules. They give us a reddish-brown rash! Let's start calling them "Rusty"!