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Q.

An orbital is described with the help of a wave function. Since  many  wave functions  are possible for 'an electron,  there  are  many  atomic orbitals. When atom is placed in a magnetic  field  the possible  number  of orientations  for an orbital  of azimuthal quantum number 3 is

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a

seven.

b

five

c

three

d

two

answer is D.

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Detailed Solution

For the azimuthal quantum number, l=3It is a p-orbital.

Magnetic quantum number ml​ have values from −l to +l and total of 2l+1 values.

For l=3, ml​ values are:

ml​=−3,−2,−1,0,1,2,3 for l=3; total ml​ values =7= Number of orientations of orbitals.

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