1.

The principal quantum number is 2,which allowed how many number of orbitals​

Answer»

❤The number of orbitals in a SHELL is the square of the principal quantum number: 12 = 1, 22 = 4, 32 = 9. There is one orbital in an s subshell (l = 0), three orbitals in a p subshell (l = 1), and five orbitals in a d subshell (l = 2). The number of orbitals in a subshell is therefore 2(l) + 1.Hope its help u ❤



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