I will be giving a high rate for immidate corecct answers !!! 1/The___________ s

ID: 881028 • Letter: I

Question

I will be giving a high rate for immidate corecct answers !!!

1/The___________ series of the hydrogen atom occur in the infared region where electrons relax down to the n = __________quantum level.

2/Following are the spectral scale readings a student obtained:

a.What is the slope for the calibration curve of this data?

( Answer in decimal form to one decimal place)

b. what is the wavelength associated for a spectral scale reading of 5.5 for the hydrogen atom?

c. what is the wavelength associated for a spectral scale reading of 4.8 for the hydrogen atom?

3/Sunlight exhibits what type of spectrum?

continuous

excitation

absorption

emission

4/Which of the following is not a Balmer Series transition?

n = 4 ---> n = 2

n = 6 ---> n = 2

n = 4 ---> n = 3

n = 5 ---> n = 2

n = 3 --> n = 2

Wavelength (in nm) Spectral Scale reading Color 414.4 4.2 Purple 447.1 4.4 blue 471.3 4.6 blue 504.8 5.0 green 587.5 5.9 yellow 706.5 7.0 red

1) Paschen , Brackett and Pfund series are occur in IR region where electrons relax down to the n = 4,5,6 quantum level.

n1 = 3 , n2 = 4,5,6......... Paschen series

n1 = 4, n2 = 5,6,7.........Brackett series

n1 = 5, n2= 6,7,8.......... Pfund series

3) a : continuous

4) c

n=4 ------> n=2 ( Balmer series)

n=6 -------> n=2 (Balmer series)

n=4 ------> n = 3 ( actually it is Paschen series)

n=5 -------> n=2 ( Balmer series)

n=3 --------> n=2 (Balmer series)