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All atoms that contain An '''element''' is a single type of [[atom]] as defined by its [[atomic number]], which is the same number of [[protons]] in its [[nucleus]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>In contrast, a single element may have varying [[mass number]]s, relating to the number of neutrons in its nucleus.

Musician-satirist Tom Lehrer wrote a song which includes The element [[hydrogen]] has only one proton whereas the names of every element known at the time the song was written[[uranium]] has 92, and there are elements with even more protons than that. Because they are in no particular orderHowever, uranium is the song is of no particular use to chemistry students, but some of them learn it for fun anyway. It is sung to a tune by Gilbert and Sullivan, replacing Gilbert's lyricslargest naturally occurring element in nature. It opens:

:There'All known elements are listed on the [[periodic table]], with the ones with more protons than uranium produced in a laboratory. Joining atoms of the same or different elements produces chemical [[compound]]s antimony, arsenic, aluminum, selenium,:And hydrogen . The elements and oxygen their compounds make up all matter on the earth and nitrogen and rhenium,quite possibly all matter outside of the earth as well.

and concludes==See also==*[[Native element]]:These are the only ones *[[Periodic table of which the news has come to Ha'vard,:And there may be many others, but they haven't been discavard.elements]]