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Valency of Group VIIA elements

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RHYS LEWIS, AHS, DECD, UNISA / ANIMATE4.COM / SCIENCE PHOTO LIBRARY RHYS LEWIS, AHS, DECD, UNISA / ANIMATE4.COM / SCIENCE PHOTO LIBRARY

Caption

Valency of Group VIIA elements. Animation of the periodic table, showing the valency of the Group VIIA elements, the halogens. The animation starts by showing the whole periodic table, followed by just the Group VIIA elements (red). The animation then shows the electron configuration of the first three elements in the group: fluorine (F), chlorine (Cl), and bromine (Br). These elements have seven electrons in their outermost electron shell. This is highlighted in red in both the electron shell diagrams and the numerical electron configuration below. The stability of an element's outer (valence) electrons determines its chemical and physical properties. For the groups shown here, the number of electrons in an element's outer electron shell corresponds to its group number in the periodic table. Group VIIA is also known as group 7 and group 17.

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  • Duration: 00:00:25.19
  • Audio: No
  • Interlaced: No
  • Capture Format: QuickTime Animation
  • Codec: Animation

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