Gen. Chem. - Chap. 6
Choose the correct answer for each question.
 

1The energy of a photon of green light (the same as the color of this text) with a wavelength of 550. nm is... (h = 6.626 x 10-34 , c = 2.998 x 108 m/s )
3.61 x 10-19 J
3.61 x 10-28 J
3.64 x 10-31 J
3.64 x 10-40 J

2The number of p-orbitals in a p-sublevel is (are)...
1
2
3
6

3Which quantum number tells the "spin" of an electron?
n
l
ml
ms

4The allowed values of ml when l = 2 are...
0,1
0,1,2
-2,-1,0,1,2
-2,0,2

5Calculate the wavelength of the photon given off when an electron in a hydrogen atom drops from n=8 down to the ground state. (RH = -2.18 x 10-18 J , h = 6.626 x 10-34 J-s , c = 2.998 x 108 m/s)
92.6 nm
5825 nm
468 nm
790 nm

6The last electron(s) in a Ga atom are found where?
2e- in the 3s sublevel
1e- in the 4p sublevel
1e- in the 3p sublevel
8e- in the 3d sublevel

7Which of the following statements regarding trends in the periodic table is NOT true?
Electronegativity increases going across and up the periodic table.
Anions are larger than their corresponding atoms.
Atoms get larger going down the periodic table.
Atoms get larger going across the periodic table.

8List the following species in order of decreasing radius.
Na, Al, Cs, Al3+
Cs>Na>Al>Al3+
Cs>Al>Na>Al3+
Cs>Na>Al3+>Al
Al>Al3+>Na>Cs

9The number of unpaired electrons in the orbital diagram of a S atom is...
0
1
2
6

10Which statement is true regarding the failure of the Bohr theory of the atom?
It could not account for spectral lines on the emmision spectra for H.
It assumed electrons were localized regions of neg. charge in a region of positive charge, like "plums in a pudding"
It could not correctly predict energy level values for H.
It only correctly predicted results for H.