Which of the following statements are true about the emission of visible 119ht w

Question

Which of the following statements are true about the emission of visible 119ht when a metal ion is placed into a burner flame? Select all that are TRUE. the color observed corresponds to the energy difference between electron orbitals. All the actions you test in the flame will produce an emission in the visible range. the heat energy from the burner excites the outermost electron to a higher orbital where it is unstable. A sodium ion will produce a bright yellow flame. According to the background section of the experiment, you will expect to see gradual as you test the solubility of the salts of Mg, Ca, Sr, and Ba. Select all of the followings that is contact hazards in this experiment H_2SO_4 HNO_3 HCI KI NaOH

Explanation / Answer

Q1.

metal ions + flames

a)

true, since changes in energy will product a respective wavelength, which is seen as color

b)

Not all cations produce light, since some cations will fall in the non-visible spectrum

c)

true, heat energy makes excitation and drop of electorns via quanta

d)

True, Sodium will give a yellow/orange color flame

Q4.

gradual color intensity

Q5.

H2SO4 --> pretty acidic,

HNO3 --> pretty acidic,

HCl --> pretty acidic,

KI --> no hazard

NaOH --> Pretty caustic

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