Platinum (Pt). Diagram of the nuclear composition,electron configuration,chemical data,and valence orbitals of an atom of platinum-195 (atomic number: 78),an isotope of this element. The nucleus consists of 78 protons (red) and 117 neutrons (orange). 78 electrons (white) successively occupy available electron shells (rings). Platinum is a transition metal in group 10,period 6,and the d-block of the periodic table. It has a melting point of 1768 degrees Celsius. The trends across the transition metals are due to electrons filling an inner d-subshell (here,within the 5th ring),shielding the outer (valence) electrons from the increasing nuclear charge | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clarivan, Carlos |
Bildgröße: | 5197 px × 5008 px |
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