RHYS LEWIS, AHS, DECD, UNISA / ANIMATE4.COM / SCIENCE PHOTO LIBRARY RHYS LEWIS, AHS, DECD, UNISA / ANIMATE4.COM / SCIENCE PHOTO LIBRARY
Isotopes of chlorine. Animation showing the two principal stable isotopes of chlorine: chlorine-35 and chlorine-37. Isotopes are forms of an element that contain different numbers of neutrons in the atomic nucleus. Chlorine-35 has 17 protons (red) and 18 neutrons (blue) in the nucleus, and chlorine-37 has 17 protons and 20 neutrons. Both isotopes also have 17 electrons (black) orbiting the nucleus.
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