Question

If n = 4 l=1 ml=0 ms= -1/2

What is the element , what is the elements complete electron configuration WITHOUT noble gas abbreviation & is it paramagnetic or diamagnetic??

Answer 1

With the four given quantum number the possible outer electronic configuration is 4P¹, where 4 is Principal Quantum Number (n), P came from Angular Momentum Quantum Number (l, which is given as 1). 1 came from Spin Quantum Number (m_s) which is 1/2.

The element in the periodic table with outer electronic configuration 4P¹ is Gallium (Ga) with atomic number 31.

The electronic configuration of Ga is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

Since it has one unpaired electron in the outer shell it is paramagnetic compound.

^{n (Principal Quantum Number) indicates the energy of an electron} and the size of the orbital

l is Angular Momentum Quantum Number, which indicates the shape of an orbital with a particular principal quantum number. The secondary quantum number divides the shells into smaller groups of orbitals called subshells.

For S orbital l = 0, for P orbital l=1, for d orbital l=2, for f orbital l =3 and so on.

m_l isMagnetic Quantum Number which specifies the orientation in space of an orbital of a given energy (n) and shape (l). Its value lies between  m_l = -l, ..., 0, ..., +l.

Spin Quantum Number (m_s):  m_s = +½ or -½. Specifies the orientation of the spin axis of an electron.