Isotopes of Hydrogen and Carbon

8 07 2009

Isotopes of Hydrogen and Carbon
Isotopes of an element differ in the number of neutrons in each atom’s nucleus. Hydrogen has two naturally occurring isotopes, normal hydrogen, which contains no neutrons, and heavy hydrogen, which has one neutron in each atom. The third isotope, tritium, has two neutrons. It is radioactive, with a half-life of 12.26 years. Carbon has three naturally occurring isotopes: carbon-12 has six neutrons in each atom; carbon-13 has seven neutrons; and carbon-14 has eight neutrons. Carbon-14 is radioactive with a half-life of 5760 years.
© Microsoft Corporation. All Rights Reserved.
Microsoft ® Encarta ® 2008. © 1993-2007 Microsoft Corporation. All rights reserved.

Isotopes of an element differ in the number of neutrons in each atom’s nucleus. Hydrogen has two naturally occurring isotopes, normal hydrogen, which contains no neutrons, and heavy hydrogen, which has one neutron in each atom. The third isotope, tritium, has two neutrons. It is radioactive, with a half-life of 12.26 years. Carbon has three naturally occurring isotopes: carbon-12 has six neutrons in each atom; carbon-13 has seven neutrons; and carbon-14 has eight neutrons. Carbon-14 is radioactive with a half-life of 5760 years.

© Microsoft Corporation. All Rights Reserved.
Microsoft ® Encarta ® 2008. © 1993-2007 Microsoft Corporation. All rights reserved.

Isotop dari suatu unsur berbeda dalam banyaknya netron pada setiap atom inti. Secara alami, Hidrogen mempunyai dua isotop, hidrogen normal, tidak  berisi netron, dan hidrogen berat  mempunyai satu netron pada setiap atom. Isotop yang ketiga, tritium, mempunyai dua netron. Adalah radioaktif, dengan suatu umur-paruh 12.26 tahun. Karbon mempunyai tiga secara alami terjadi isotop: karbon-12 mempunyai enam netron pada setiap atom; carbon-13 mempunyai tujuh netron; dan carbon-14 mempunyai delapan netron. Carbon-14 adalah radioaktif dengan suatu umur-paruh 5760 tahun.
Microsoft® Encarta® 2008.© 1993-2007 Microsoft Korporasi.


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