What are sub-shells?
Answer:
Subshells:
Electron subshells are identified by the letters s, p, d, f, g, h, i, etc., corresponding to the azimuthal quantum numbers (l-values) 0, 1, 2, 3, 4, 5, 6, etc. Each shell can hold up to 2, 6, 10, 14, 18, 22 and 26 electrons respectively, or 2(2l + 1) electrons in each subshell. The notation 's', 'p', 'd', and 'f' originate from a now-discredited system of categorizing spectral lines as "sharp", "principal", "diffuse", or "fundamental", based on their observed fine structure. When the first four types of orbitals were described, they were associated with these spectral line types, but there were no other names. The designations 'g', 'h', and so on, were derived by following alphabetical order.
the layers which are present inside a shell(s,p,d,f) are called the sub shells(k,l,m,n,o...)
every atom has shells which has electrons. they are denoted by the letter "n". each shell has a fixed number of sub shells. first shell has 1 sub shell. second one has 3.third one has 5. and so on.
in an atom, electrons move around the nucleus in certain orbits. the orbits are designated as K,L,M,N.. .... in between the orbits ( K and L , L and M ...) there are many other small electrons which can be seen in the presence of magnetic field .these are called sub shells , and are denoted by s,pd,f .. (under magnetic field these sub shells are again divided into sub stationary shells ). the energy difference in the sub shells is negligible..i hope u have understood
Electronic arrangement in the atom is taking place in shells and these Shell are denoted as S P D F . In each of the shell again electrons are arranged in some specific manner. As electrons are moving on its axis and around the nuclei, it produces magnetic field. to overcome this effect, electrons arrange them self in pairing with axial rotation in opposite direction. This arrangement is known as arrangement of sub shells. these sub shells are denoted as k, l, m, n o p .
In flame photometry and spectra like atomic absorbance, electrons movement from one level - sub shell to another level needs some specifies energy change. this changes are observed as spectra.
There is an illustration of an electron at http://youtube.com "gravity engine" showing the four spin states of an electron and an explanation of why it forms as it does.
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