Boron (B). Diagram showing the nuclear composition and electron configuration of an atom of boron-11 (atomic number: 5),the most common isotope of the element boron. The nucleus consists of 5 protons (red) and 6 neutrons (yellow). Five electrons (white) bind to the nucleus,successively occupying available electron shells (rings). The stability of an element's outer electrons determines its chemical and physical properties. Boron is a metalloid in group 13,period 2,and the p-block of the periodic table. Although difficult to prepare,at room temperature and pressure it forms a solid that melts at 2076 degrees Celsius | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clarivan, Carlos |
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