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node (110 words) |
 | Either of the points on the celestial sphere at which the plane of an orbit intersects a reference plane. |
| The position of a node is one of the standard orbital elements used to specify the orientation of an orbit. |
| An antinode lies 90° of orbital longitude away from its corresponding node. |
| S Orbitals (75 words) |
| The 2s orbital is distinctly different from the 1s orbital. |
| The node of the 2s orbital is responsible for the presence of two spheres. |
| In a 2s orbital the electron density increases to a maximum near the nucleus and then drops off to zero at the node. |
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