Which is true about Heisenberg’s Uncertainty Principle? Electrons _____. *
A. stay only in one place.
B. are found in definite energy level.
C. jump from a lower to a higher energy level.
D. cannot exactly be located but a probable location is possible.
2. An orbital is described as the __________. *
orbit in an atom
B. definite location of an electron
C. highest principal energy level of an atom
D. region in space where electrons are most likely to be found.
3. What is the electron configuration of the element Sulfur? (Atomic number is 16.) *
A. 1s2 2s2 2p6 3p6
B. 1s2 2s2 2p6 3s2 3p4
C. 1s1 2s1 2p6 3s2 3p6
D. 1s2 2s3 2p5 3s2 3p4
4. Which is the BEST representation of electrons in an atom at ground state? *

A

B.

C.

D.
5. Which set is NOT an acceptable set of quantum numbers? *
A. n=2, l =1, ml = -1
B. n=2, l =1, ml = 1
C. n=7, l =3, ml = 3
D. n=3, l =1, ml = -3
6. What are the quantum numbers that describe a 3p orbital? *
A. n =3, l =1, ml = 1
B. n =3, l =1, ml =-1
C. n =3, l =1, ml = 0
D. all of the above
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