The reason for lower intensity of atomic line for Li in a natural gas flame, 1800 o C in comparison to the hydrogen-oxygen flame, 2700 o C should be determined. Concept introduction: Spectral lines are lines which help in identifying the atoms and molecules. These are a result of absorption or emission of light in a comparatively narrower frequency range compared to the frequencies nearby. With the increase in temperature, there are more atoms excited and more electron transition happens from ground state to excited state. This results in more intensity of the emission line.

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6. Match each of the lettered items in the column on the left with the most appropriate numbered item(s) in the column on the right. Some of the numbered items may be used more than once and some not at all. a. Z = 37 1. b. Mn 2. C. Pr element in period 5 and group 14 element in period 5 and group 15 d. S e. [Rn] 7s¹ f. d block metal 3. highest metallic character of all the elements 4. paramagnetic with 5 unpaired electrons 5. 4f36s2 6. isoelectronic with Ca²+ cation 7. an alkaline metal 8. an f-block element

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Chapter 8, Problem 8.6QAP

Interpretation Introduction

Interpretation:

The reason for lower intensity of atomic line for Li in a natural gas flame, 1800 ^oC in comparison to the hydrogen-oxygen flame, 2700 ^oC should be determined.

Concept introduction:

Spectral lines are lines which help in identifying the atoms and molecules. These are a result of absorption or emission of light in a comparatively narrower frequency range compared to the frequencies nearby.

With the increase in temperature, there are more atoms excited and more electron transition happens from ground state to excited state. This results in more intensity of the emission line.

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