Difference between revisions of "Element"
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An '''element''' is a single type of [[atom]] as defined by its periodic number, which is the number of [[protons]] in its [[nucleus]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> [[Hydrogen]] has only one proton whereas [[uranium]] has 92. Uranium is the largest of the stable elements occurring in nature. All known elements are listed on the [[periodic table]], with the heavier ones produced in a laboratory. Chemical [[compound]]s are made from joining atoms of the same or different elements. These elements and their compounds make up all matter on the earth and quite possibly all matter outside of the earth as well. | An '''element''' is a single type of [[atom]] as defined by its periodic number, which is the number of [[protons]] in its [[nucleus]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> [[Hydrogen]] has only one proton whereas [[uranium]] has 92. Uranium is the largest of the stable elements occurring in nature. All known elements are listed on the [[periodic table]], with the heavier ones produced in a laboratory. Chemical [[compound]]s are made from joining atoms of the same or different elements. These elements and their compounds make up all matter on the earth and quite possibly all matter outside of the earth as well. | ||
| + | A single element may have varying mass numbers, relating to the number of neutrons in its nucleus. | ||
==References== | ==References== | ||
Revision as of 13:27, December 18, 2008
An element is a single type of atom as defined by its periodic number, which is the number of protons in its nucleus.[1] Hydrogen has only one proton whereas uranium has 92. Uranium is the largest of the stable elements occurring in nature. All known elements are listed on the periodic table, with the heavier ones produced in a laboratory. Chemical compounds are made from joining atoms of the same or different elements. These elements and their compounds make up all matter on the earth and quite possibly all matter outside of the earth as well. A single element may have varying mass numbers, relating to the number of neutrons in its nucleus.
References
- ↑ Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000
