bazylevnik0

Molecular physics: study of physical properties of molecules and molecular dynamics. Areas: physical chemistry, chemical physics and quantum chemistry. Experiments techniques: spectroscopy and scattering. Bohr model: Energy levels of electrons with different distance from nucleus. (n - quantum number) Electron can absorb photon and change the own level. For example from 2 to 3 if electron return from 3 to 2 it emmit new photon. E n = -hc * R * Z 2 /n 2 E n - energy of electron h,c -Plank constant, Light speed constant R - Rydberg constnat Z - atomic number n - quantum number E = hν = hc/ λ => ΔE = 1 / λ = RZ 2 (1/n 1 2 -  1/n 2 2 ) n 2 - electron from (initial, begins) ΔE electron = E photon Occupied orbitals (l - quantum  number)  s orbital : l = 0 p orbital : l = 1 d orbital : l = 2 f orbital  : l = 3 l = 0, 1 , 2 , ... , n - 1  * all orbitals  with included ( n - 1) if n = 3; => l = 0, 1, 2 m l = -l ... l - specific orbital if l = 2 m l = -2, ...

crossection  2D plane(shape) with intersection of 3D shape(figure) - crosssection of solid Horizontal crossection Vertical crossection *of sphere **also exist different/other types of crossections(with random angles, complex planes) polyhedrons polygon - shape built by line segments Prism Based on an n-angle polygon, with two connected parallel bases *lines of connection are shaping parallelograms Formulas S(all) = 2*S(base)+ S(side) S(side) - n*shape V = S(of the base or horizontal crossection)*l *l - side edge *S - surface area *V - volume  Straight & regular prism Diagonal in straight: d = a^2*b^2*l^2, l = h *straigh with straigh angles to base Cube *all edges are equal Pyramid Straight and regular pyramid *in straight - top vertex above the centroid of the base Formulas S(all) = S(sides)+S(base) S(side) - S of triangle V = ⅓*S(base)*h *h - height **for proof V: Build cube with diagonals - will see 6 equal pyramids Volume of cube = a*b*c; S(base) = a*b; c = H In one pyr...