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n=2 has 3 2p orbitals.
http://en.wikipedia.org/wiki/Quantum_number
The "formula" is n2 - so for principal quantum number 4 there are 16 orbitals, correspnding to one X s orital, three X p orbitals, five X d orbitals, seven X f orbitals.
Hybridization comes from very complicated Quantum Mechanics and says that as many molecular orbitals that are being combound, the exact same number of hybrid orbitals are formed. Essentially, spherical s-orbitals and somewhat ellipcitcal p-orbitals are fused to make new orbitals that are identical. Example: 4 equivalent (tetragonal) sp3-orbitals in CH4 molecules.
All p sublevels contain three orbitals, including the 4p sublevel.
All four quantum numbers i.e principle ,azimuthal or subsidiary, magnetic and spin quantum numbers are required to specify a single atomic orbital.
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10 electrons.The angular momentum quantum number is l (small L). This quantum number is dependant on the principal quantum number, and has values, 0 1,2 ..(n-1), where each value of n refers to a subshell known to chemists as followsn= 0, s orbital; n=1, p orbital; n= 2, d orbital; n= 3, f orbital.So we are looking at the d orbitals.There are five d orbitals, with magnetic quantum numbers running from -l to +l, that is -2, -1, 0, +1, +2Each of these can hold 2 electrons (with spin quantum numbers -1/2, +1/2)So we have 10 electrons that can have pricipal quantum numbers of 4 and angular monmentum quantum number of 2.
magnetic quantum number tells about the orientation of atomic orbitals which is actually obtained as a resolution due to the application of magnetic or electric field (stark effect).It is very significant and it has many applications
Ti: 1s22s22p63s23p64s25d2 . It has a total of 22 electrons occupying these orbitals of these quantum numbers.
the quantum number n determines the energy of an electron in a hyrdogen atom.
If the question is an attempt to ask "How many orbitals are there with principal quantum number n = 2", then 4 orbitals which can hold a total of 8 electrons.