Chapter 7 Worksheet 1

1. Arrange the following types of electromagnetic radiation in order of increasing wavelength:

a. radio waves < microwave < infrared < visible < ultraviolet <x-rayb. microwave < ultraviolet < radio waves < infrared < x-ray <visiblec. x-ray < ultraviolet < visible < infrared < microwave < radiowavesd. visible < x-ray < microwave < ultraviolet < radio waves <infrarede. None of these

2. A microwave photon has a frequency of 5,856.5 MHz. What is its wavelength in meters?

3. Rank the following photons in terms of increasing energy: blue (l; = 453 nm); red (l; = 660 nm); yellow (l; = 595 nm).

4. Calculate the energy of an electron in the hydrogen atom if it resides in energy level number 5.

a. 8.72 x 10-20

b. 4.36 x 10-19

c. -8.72 x 10-20

d. -2.09 x 10-18

e. -4.36 x 10-19

5. How many orbitals in an atom can have following designation:1s

a. 2b. 1c. 4d. 3e. an infinite number

6. Give the number of orbitals an atom can have with the following designation:

n = 3

a. 10b. 3c. 5d. 4e. None of these

7. How many d orbitals reside in d subshell?

a. 1b. 2c. 3d. 5e. 7

8. Which statement is true concerning atomic spectra?

a. An emission spectrum is produced when atoms are excited to higher energy levels and simultaneously emit photons.

b. During the production of emission spectra, electrons move from higher to lower energy levels.

c. Absorption spectra are seen as colored lines against a dark background.

d. The emission spectrum of hydrogen consists of four lines but other elements have more lines.

e. Each line in the emission spectrum of hydrogen represents one of the allowed energy levels in the hydrogen atom.