Paper

For numerical problems, calculation set up should be shown.

1. Complete the table for the following neutral atoms. Show your work in the space below the table.

2. Complete the table for the following ions. Show your work in the space below the table.

3. Circle the best answer for each question. Briefly explain your choice for each one.

(1) What is the mass of an ion that has 16 protons, 18 electrons, and 16 neutrons?

a. 50 amu

Briefly explain your choice here:

b. 34 amu

c. 32 amu

d. 18 amu

e. 16 amu

(2) What is the charge of an ion that has 19 protons, 18 electrons, and 20 neutrons?

a. –2

Briefly explain your choice here:

b. –1

c. 0

d. +1

e. +2

(3) If an ion had 16 protons and 18 electrons, which element would it be?

a. nitrogen (N)

Briefly explain your choice here:

b. sulfur (S)

c. neon (Ne)

d. oxygen (O)

4. List the names and molecule formulas for the seven elements that most commonly exist as diatomic molecules.

5. List the names and symbols for the six elements that are metalloids.

6. List the names and symbols for:

a. three alkali metals b. three halogens

c. three noble gases d. three alkaline earth metals

7. List the names and symbols for:

a. three transition metals b. three inner-transition metals

c. three main-group elements

8. Read the following statements about electromagnetic radiation and photons. For each one, circle or underline the uppercase word that makes the statement true.

a. If two things are directly related to each other, or directly proportional to each other, then when one of the things gets larger, the other one gets LARGER / SMALLER.

b. If two things are inversely related to each other, or inversely proportional to each other, then when one of the things gets larger, the other one gets LARGER / SMALLER.

c. Wavelength and frequency are DIRECTLY / INVERSELY related to each other.

d. Energy and frequency are DIRECTLY / INVERSELY related to each other.

e. Wavelength and energy are DIRECTLY / INVERSELY related to each other.

9. What is the frequency of a photon in the yellow part of the visible range if its wavelength is 575 nanometers?

10. a. What is the wavelength of a photon in the microwave range with a frequency of 2.60x1011 Hz?

b. You can listen to Orioles games on FM radio station 105.7. What is the wavelength for photons that have a frequency of 105.7 MHz?

11. The amount of energy needed for a photon to break apart an O2 molecule into individual oxygen atoms is 8.20x10–19 Joules.

a. What is the frequency of one of these photons?

b. What is the wavelength of one of these photons?

12. The photons of visible light have wavelengths from about 400 nm to about 750 nm (assume 2 significant figures in these values).

What is the smallest energy that a photon can have, and still be in the visible light category?

13. Identify the elements from their electron configurations. Write both the name and symbol for each element.

a. [Kr] 5s2

b. [Ar] 4s2 3d2

c.[Ar] 4s2 3d10 4p6

d. [Ne] 3s2 3p5

e. [Kr] 5s2 4d4

14. Write orbital diagrams for these atoms. Use the noble gas core abbreviations.

15. Write electron configurations for these atoms. Use the noble gas core abbreviations.

a. beryllium, Be (#4)

b. xenon, Xe (#54)

c. technetium, Tc (#43)

d. bromine, Br (#35)

16. Write orbital diagrams for these atoms and ions. Use the noble gas core abbreviations.

17. Write electron configurations for these atoms and ions. Use the noble gas core abbreviations.

a. As (#33)

b. As3- (add 3 electrons)

c. Mn (#25)

d. Mn2+ (remove 2 electrons, s before d)

+

4

52

25

Mn

-

3

75

33

As

-

Cl

36

17

Ga

72

31

Xe

132

54

+

2

66

30

Zn