Please enable JavaScript.
Coggle requires JavaScript to display documents.
electrons (Theory (Quantization: energy of electron in n is fixed, Energy…
electrons
Theory
-
-
-
-
Atom in G.S absorbs a definite amount of energy thru heat or electricity so electron jumps from lower to higher n(s)(excited state)
Energy absorbed=E2(excited)-E1(ground)=h(Planck's constant)f(frequency/amount of energy of light emitted)..... energy difference/absorbed is proportional to frequency of light emitted.
-
-
Each element has a unique E.L S because each element has different number of electrons and arrangement in energy levels.Different numbers and transitions 4 each element..transitions gives rise to different E L S
Each light of definite frequency appears as line of particular colour in emission spectrum.Only definite emitted so electrons occupy definite energy levels
-
Work
-
-
-
-
-
-
-
-
-
H many transitions because millions of atoms of H in sample, not all atoms get same amount of energy. Fluorescent light strips and lasers:transition
Emission Line Spectrum
Beam from H discharge tube(glass tube with gas at L pressure, current) passed thru prism
-
-
-
-
-
-
-
Flame Tests
-
-
-
-
-
-
metal salt heated,colours emit:metal present
Atomic Orbitals
Orbital vs Orbit(path of electron travelling with certain velocity at a precise distance from nucleus)
-
-
-
P-dumbbell.-3 axes at 90* (x,y,z:direction)=energy.-differ in orientation
-
Wave Nature
-
-
Bohr theory wrong. Treated maths Heisenberg.The beam strikes & detects the location of the electron but as it has a small mass its velocity changed. as there is a wave motion electron cant travel at certain velocity at precise distance from nucleus.
-
-
-
-
-
Sublevel
-
single line was number of lines close eg Na-2lines.It wasnt main energy levels because they were too close
each energy level except n=1 has sublevels,close in energy.Number of sublevels=n
s,p,d,f.....4s lower in energy than 3d
AAS
operation
-
-
-
atoms in G S absorbslight of a particular w,specific to that element
-