Radioactive is an album.
Radioactive (Imagine Dragons song) . Musically , `` Radioactive '' is an electronic rock and alternative rock song with elements of dubstep and contains cryptic lyrics about apocalyptic and revolutionist themes . The song received positive reviews from critics , who praised the production , lyrics , and vocals , calling it a highlight on the album . The song has also reached number one in Sweden and in the top 20 in several countries including Australia , Canada , New Zealand and the United Kingdom , becoming Imagine Dragons ' most successful single to date .