Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of niobium-93 (atomic number: 41), the most common isotope of this element. The nucleus consists of 41 protons (blue) and 52 neutrons (red). Niobium is a transition metal in group 5, period 5, and the d-block of the periodic table. It has a melting point of 2477 degrees Celsius. The trends across the transition metals are due to electrons filling an inner d-subshell (here, within the 4th ring), shielding the outer (valence) electrons from the increasing nuclear charge. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clarivan, Carlos |
Bildgröße: | 4800 px × 3872 px |
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Eigentums-Rechte: | nicht erforderlich |
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