Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of beryllium-9 (atomic number: 4), the most common isotope
Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of beryllium-9 (atomic number: 4), the most common isotope of the element beryllium. The nucleus consists of 4 protons (blue) and 5 neutrons (red). Four electrons (white) occupy available electron shells (rings). The stability of an element's outer (valence) electrons determines its chemical and physical properties. Beryllium is an alkaline earth metal in group 2, period 2, and the s-block of the periodic table. At room temperature and pressure it forms a brittle metal that melts at 1287 degrees Celsius.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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