Abundance of the chemical elements of the volatile elements hydrogen, helium, neon, and nitrogen, as well as carbon which has been lost as volatile hydrocarbons. The remaining elemental composition is roughly typical of the "rocky" inner planets, which formed in the thermal zone where solar heat drove volatile compounds into space. The Earth retains oxygen as the second-largest component of its mass (and largest atomic-fraction), mainly from this element being retained in silicate minerals which have a very high melting point and low vapor pressure. The mass-abundance of the nine most abundant elements in the Earth's crust is approximately: oxygen 46%, silicon 28%, aluminum 8.2%,
The Elements (song) the song "Tchaikovsky and Other Russians", written by Ira Gershwin, which listed fifty Russian composers in a similar manner. "The Elements" differs from the "Major-General's Song" in that: "The Elements" has been featured in popular culture many times. In the episode "Ex-File" of "NCIS", Timothy McGee and Abby Sciuto hum the song, which forms a key clue in their case. In "The Big Bang Theory" episode "The Pants Alternative", a drunk Sheldon Cooper starts to sing the song during his acceptance of an award from his university. In the 2006 episode of "Gilmore Girls" called "The Real Paul Anka", Luke