CHE 111  Electronic Configurations Practice Quiz

You may use paper, pencil, calculator, Periodic Table, & the given values below.
GIVEN: c = 3.00 x 108 m/s and h = 6.63 x 10-34 Js

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1. Which of the following have the same valence electron configuration?

a) Na &  Na+  

b) N & P

c) O & N

d) none of these

2. Which of the following are isoelectronic with each other?

a) Ca & Mg

b) K &   K+  

c)  Cl-   & Ar

d) none of these

3. Imagine that an electron of an excited H atom is making a transition to a lower energy level. In which of the following scenarios is the most energy given off?

a) n = 4 to n = 3 level

b) n = 3 to n = 2 level

c) n = 2 to n = 1 level

d) none of these transitions gives off energy.

4. What is the azimuthal quantum number, l, for an electron in a 4f orbital?

a) 4

b) 1

c) 2

d) none of these

5. How many valence electrons does an atom of Si have?

a) 4

b) 3

c) 2

d) none of these

6. The wavelength of an EM radiation is 923 nm. Calculate the frequency of this radiation.

a) 3.25 x 105 Hz

b) 277 Hz

c) 3.25 x 1014 Hz

d) none of these

7. A particular electron of Sr has this set of quantum numbers: (3,2,1,1/2). In what orbital is the electron?

a) 3d

b) 3p

c) 2s

d) none of these

8. A species which is isoelectronic with Kr is

a) Cl-

b) Se2-

c) Rb

d) none of these

9. The frequency of an EM radiation is 4.50 x 1013 Hz. Calculate the energy of a photon of this radiation?

a) 1.47 x 10-47 J

b) 4.42 x 10-39 J

c) 2.98 x 10-20 J

d) none of these

10. Which of the following types of EM radiation has the highest energy?

a) microwaves

b) visible light

c) infrared

d) No generalization can be made.

11. How many minutes did you spend taking this practice quiz?