![]() This is the reason all orbitals can hold a maximum of two electrons. Therefore, if two electrons occupy the same orbital, they must have different spins. Rule 3 (Pauli-Exclusion Principle): Each electron is described with a unique set of four quantum numbers (a unique address). The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to.For example, all three p orbitals in a p subshell will have one electron before a single p orbital contains two electrons. Furthermore, the most stable configuration results when the spins are parallel (i.e. ![]() Question: What is the distance from the Earth to a star if its parallax is 0.2 seconds of arc Answer the distance in (a) parsecs, (b) light years, and (c) meters. same shell and subshell), they must first singly occupy (half-fill) each empty orbital in a subshell before double occupying (completely filling) them. Youll get a detailed solution from a subject matter expert that helps you learn core concepts. You can view more details on each measurement unit: meters or parsec The SI base unit for length is the metre. We assume you are converting between metre and parsec.
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