Question

What is the equation that describes the relationship between the photon energy, the clectron jonization energy and the electronice ceny! Gurur! green light (540 mm) and produce electrons that wer as being correct in terms of what you have learned Tahle that can be used to detect green light (540 mm Identify the metal in Table 2 that can be red have a intr y of O2 V. Justify your answers Use the data in Table 3 to show what the photoclectron spectrum for fun looks like. Put the electron kinetic energy scale on the axis and delines the energies where the photocurrent poes through maxima when the photon enery is 1.600 To Work Functions of some Metals V Bantin Energies of some Chemins Units 103 1 T h e rese 2.18 N y e Light Source 104 191 32.1 475 095 150 2.26 2.96 1.32 181 658 404 aus os the w deine TY orks out here the Explais how the data in Table movies vidence that e nsin atoms are organized in shells 0 Ne Mg 874 5.19 1120 6.45 1400 7.78 1730 114 209.0 15.1 2510 201 2160 25.1 3450 311 1970 3 4540 446 5140 524 5770 617 2.18 2.79 3.46 6.10 0.83 8.83 1.23 13.0 1810 17.1 2.43 224 3.24 274 3.41 33.6 400 401 467 2184 603

Answer 1

Answer 1

Answert thegy of photon - hc (6.626 XW J6) (3 x los . (540xlolm) 3.688 10 19 J o lev. 1-602 x 10th I 3.68x10-19 ) - 3.68x18x 1.602 xhoty -12.30 er len K.E2 0.2 eV Energy of photon - Work function & Kineac energy 2.30 ev & Work function + 0.2ev Work flinetion = 2.30 – 0.2 = (2-10 ev Element is Cesium) Answer & a) Equation's called photo elective effect egn. - Kinetic energy (2 mue) Energy of photon o Work function

Answer 2b)

Energy of photon is not clearly visible.

If it is 1.60 x 10^-14 J

Answer 2b) Photo electron spectra of with different energies from 2p, 2s and ls. Flourine will have 3 peates. corresponding to é release When photon enegy 160 x to the J. = 1600 xlo-18 J. Binding (B. e) of 2p. 2.19 x 1018, so, e energy 18997, 21J 25 = 6.45 810185, so, é = 15993. 55 J. tsa 112.0 x10 187, so, é = 15888 0J.

Spectra

electrons No of 15880 1580 1590 15995 16000 ke of electron.

If energy of photon is 1.60 x 10^-24 J, then the electrons will not be emitted because it is less than three bonding energies.

Answer c)

As for every atom, different values of binding energies are given which are different for a set of electrons.

This indicates the electrons are arranged in a specific set, called shells, with larger shell number having lower binding energy.

Inside the shell, electrons are present in subshell and again different subshells in an atom have different binding energies.