Unit 5 Quiz
| e-mail activity (15 Points) | Name _______________________________ |
For each question below, select the "best"answer and write a brief explanation supporting your choice. Use the practice quiz answers as a guide for this activity.
1(3) Select from the following types of radiation, how many have energies greater than that of visible blue light ?
visible green, visible red, microwaves, ultraviolet or x-rays
| a) 0 | b) 1 | c) 2 | d) 3 | e) 4 |
2(3) When a hydrogen electron makes a transition from energy level, n = 3 to n= 1, which of the follwing statements are true? Hint: Maybe more than one
a) energy is emitted b) energy is absorbed c) the electron loses energy d) the electron gains energy e) the electron cannot make this transition
3(3) Which is an acceptable set of quantum numbers consistent with a "3d" electron ?
n
l
m(l)
a
3
3
1
b
3
2
1
c
3
1
1
d
3
1
0
e
3
0
0
4(3) What is the frequency of light in the UV region with a wavelength of 350 nm?
| a) 1.55x10E-16 | b) 1.55x10E-9 | c)8.57x10E+14 | d) 8.57x10E-14 | e) 3.0x10E+8 |
5(3) A frequency in the microwave region is 3.8 x 10E+10 Hz , what is the energy per mole of photons with this frequency ?
| a) 8.0x10E-3 j/mol | b) 2.5x10E-23 j/mol | c) 2.50 j/mol | d)15.14 j/mol |
6(3) The number of orbitals in a "4d" subshell is
| a) one | b) three | c) five | d) seven | e) eight |
7(3) What type of atomic orbital is designated n = 2, l = 1 and m(l) = -1 ?
| a) 2p | b) 2s | c) 2d | d) 3p | e) 1p |
8(4) In the possible answers to question 7, which orbital designations are not allowed ? Briefly explain.
9(5) A region of an "electron density" (probability) diagram where the probability of "finding" an electron is zero is called a _________. Make a sketch of a "p(x)" atomic orbital label the axis, "x ,y and z" and indicate the point of zero probabiltiy of finding an electron for a "p(x)" electron.
10(5) The author of the study guide for the text suggests, "There is no substitute for carefully memorizing the rules that determinethe possible quantum number values. It is impossible to understand atomic structure unless you have thoroughly learned these rules ". Briefly, explain what "rules" he is talking about?