4 9 points Each arrow to the right shows the initial and fin

4. (9 points) Each arrow to the right shows the initial and final states in a transition. A is the longest arrow and E is the shortest 2.5-,12 2.0 a) Do the transition arrows represent absorption or emission? Circle one: Absorption/Emission 1.0 132 0.5 b) A corresponding spectrum for the five transitions is below. On the spectrum, label the five peaks with the corresponding transition, A-E 400 1200 1600 Wavelength (nm) 5. (6 points) In the right column label each with the most appropriate choice. Type of instrument (AAS /AES/ XRF/ ICP-MS) Dzlamp hv PMT Process Atomic Chopper Lock -in

Solution

4) (a) Emission because atoms from higher higher energy are coming to lower energy after different wavelengths of light.

(b) Energy is inversely proportional to wavelength ,so more the energy emitted lower will be the wavelength. E has lowest energy difference hence longest wavelength. hence in order as shown in graph : E C D B A

5) AES

AAS

XRF