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What could be a third quantum number of a 2p3 electron in phosphorus, 1s22s22p63s23p3?A.ml = -1B.ml = -2C.ml = 3D.ml = 2SUBMITarrow_backPREVIOUS

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Solution

The third quantum number, also known as the magnetic quantum number (ml), is related to the specific orbital within a subshell where an electron is likely to be found. The possible values of ml range from -l to +l, where l is the azimuthal quantum number (second quantum number) associated with the subshell.

For a 2p electron, the azimuthal quantum number l is 1 (since for s, p, d, and f orbitals, l is 0, 1, 2, and 3 respectively). Therefore, the possible values of ml for a 2p electron are -1, 0, and +1.

So, the third quantum number of a 2p3 electron in phosphorus could be ml = -1 (option A). The other options (B, C, and D) are not valid as they fall outside the possible range for a 2p electron.

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