Question

Lyman series 94 nm 95 nm 3 un 97 nm 122 nm n 486 nm 434 nm Balmer series 410 nm n = 1 1875 nm 11282 nm n = 1094 nm 3 Paschen series n = 4 n = 6 n = 5

a) Explain what each of the follow represent in the diagram: i) n = 1, ii) the red dot iii) the radial straight lines iv) the concentric circles

b) i) Rank the wavelengths of the Lyman series from smallest to largest. ii) Rank the frequencies of the Lyman series from smallest to largest. iii) Rank the photo speeds of the Lyman series from smallest to largest.

c) What color light is absorbed by an electron excitation from n = 2 to n = 6? How do you know?

d) What type of electromagnetic wave is emitted when an electron falls from n = 6 to n = 1? How do you know?

Answer 1

a) nel repensents the first principle shell around nucleus which is also known as 'K' Shell. (i) Red dot represents the nucleus of an alom. (iii) The rachial Steaight lines represent the wabength of photons emitted! absorbed when an electron makes a transition from a higher n-valued shell to lowan-valued Shell/or lower n-valued shell to higher n-valued shell respectively live concentric Circles represents deffennt thells (K, L, M, N ...) 6) li ) Lyman series q4nm, 95um, q7um, 103 mm, เ ห 1221609 1 3x40-91 (il rece using f = 2 .: Order of frequencies of 34108 3008 34c06 , 34608, ; 3x108 45x10-9 94810 9 » 2.459.110'5, 2.913 410", 3.09X1015, 3.1661015 3. 19x10's (H2) lii) Photon speed is equal for all transitions (= 3x108 mi)

الم -orbed (c) n=2 to n=6 d=410nm - Violet colour - is absorbed, di n=6 to n=1 d=94nm (Lynem) ultraviolet electronognetic waves because 94 um lies in uw region of EM spectrum-

Please ask your doubts or queries in the comment section below.

Please kindly upvote if you are satisfied with the solution.

Thank you.