Based on their latest release on http://www.youtube.com/watch?v=wsVFmCoykZ4, which is in a different key from the original Capo on the 4th Fret Intro: Em G D Asus2 (4x) ( Tab from: http://www.guitartabs.cc/tabs/i/imagine_dragons/radioactive_acoustic_crd.html ) Em G D I'm waking up to ash and dust Asus2 Em I wipe my brow and I sweat my rust G D(Pause, strum while palm muting until you breathe out) I'm breathing in the chemicals Em G D Asus2 Em I'm breaking in, shaping up, then checking out on the prison bus G D This is it, the apocalypse A(Pause!) Whoa Em G I'm waking up, I feel it in my bones D Asus2 Enough to make my systems grow Em G Welcome to the new age, to the new age D Asus2 Welcome to the new age, to the new age Em G D Asus2 Whoa, whoa, I'm radioactive, radioactive Em G D Asus2 Whoa, whoa, I'm radioactive, radioactive (Em G D Asus2 continues throughout the rest of the song)
Source: http://www.guitartabs.cc/tabs/i/imagine_dragons/radioactive_acoustic_crd.html