7py electron orbital, illustration. An electron orbital is a region surrounding an atomic nucleus (not visible) where one or a pair of electrons is mo
7py electron orbital, illustration. An electron orbital is a region surrounding an atomic nucleus (not visible) where one or a pair of electrons is most likely to exist. The three 7p orbitals are made up of twelve lobes centred on the nucleus. The orbital is seen transparent at middle to show the axes of symmetry and the spherical nodes and planar node can be seen at right. Nodes are the regions in an atom with zero electron density and where the electron is least likely to exist. For the 7py electron orbital, '7' indicates that it is the seventh energy level, 'p' indicates that the orbital is shaped like a dumbbell shape with two lobes, and 'y' indicates the orientation of the orbital along the y-axis. The 7py orbital can accommodate up to 2 electrons. The 7 shell also contains a spherical, lower energy 4s orbital and five 4d orbitals and seven 4f orbitals at a higher energy (not seen).
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