Download Chemistry 2 Chapter 15 Review

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Chemistry 2 Chapter 15 Review – Ionic Compounds
Please answer the questions on a separate piece of paper!
1. How many valence electrons are involved in writing the Lewis structure of AsF3?
a. 5
b. 21
c. 26
d. 8
e. 32
2. Which ionic formula is incorrect?
a. K(NO3)2
b. CaCO3
c. Fe(OH)2
d. (NH4)2S
e. Ca(ClO3)2
3. How many unpaired electrons are in the Lewis electron-dot symbol for an oxygen
atom?
a. 0
b. 1
c. 2
d. 4
4. Which ionic compound is not expected to form from a combination of the following
pairs of elements?
a. SrO
b. Ca3N2
c. Li2S
d. GaS
e. MgS
5. What is the formula for potassium sulfide?
a. KS
b. K2S
c. KS2
d. K2S2
6. Based upon electron configuration, which ion would magnesium most likely form?
a. Mg2+
b. Mg2–
c. Mg6–
d. Mg6+
e. Mg–
7. Which ion below has a noble-gas electron configuration?
a. S3–
b. O2+
c. I+
d. K–
e. Cl–
8. Which ion has the wrong charge?
a. Cs1+
b. Ba2+
c. Te2–
d. Xe1–
e. I1–
9. The formula for the ionic compound formed between magnesium and sulfur is
a. MgS.
b. Mg2S.
c. MgS2.
d. Mg2S2.
10. Which of the following compounds is not ionic?
a. Fe2O3
b. NaOH
c. NF3
d. CuCl2
e. CdS
11. The Lewis structure of InBr3 contains how many valence electrons?
a. 3
b. 6
c. 7
d. 24
e. 26
12. If Na reacts with element X to form an ionic compound with the formula Na3X, then
Ca will react with X to form
a. CaX2.
b. CaX.
c. Ca2X3.
d. Ca3X2.
13. Which of the following is not an ionic compound?
a. K2O
b. Na2SO4
c. SiO2
d. Li3N
14. Which ionic compound is not expected to form from a combination of the following
pairs of elements?
a. RbCl
b. K3N
c. CsO
d. AlN
e. Al2O3
15. Which ion has the wrong charge?
a. Cs+
b. Mg2+
c. S2–
d. Fr–
e. Ca2+
16. Short answer: Write the electron configuration of the calcium ion.
17. Short answer: Write the electron configuration of the oxide ion.
18. How many electrons does nitrogen gain in order to achieve a noble-gas electron
configuration (nitrogen becomes isoelectric with Ne).
a. 1
b. 2
c. 3
d. 4
e. 5
19. How many electrons does boron need to give up to be isoelectric with a noble gas?
a. 1
b. 2
c. 3
d. 4
e. 5
Short Answer:
20. What is the charge of an atom with 9 protons and 10 electrons?
21. What is the name given to the electrons in the highest occupied energy level of an
atom?
22. What is the maximum charge an ion is likely to have?
23. What is the charge on the cation in sodium sulfide?
24. What is the charge of the anion in Magnesium chloride?
25. What is the formula of sodium nitride?
26. What is the formula of sodium nitrate?
27. What is the formula of copper(II) nitrite?
28. What is the name of the compound if lithium and bromine form an ionic compound?
29. Ionic compounds are normally in which physical state at room temperature?
30. The melting point temperatures of ionic compounds are usually high or low?
Hint: think about bond strength…increasing bond strength means it takes more energy to
melt the compound...are ionic bonds strong or weak?
31. Do ionic solids conduct electricity when dissolved in water (aqueous)?
32. What is the coordination number of body-centered cubic crystals?
33. What metallic crystal has a coordination number of 8?
34. List three general characteristics of metals.
35. List at least three general characteristics of ionic compounds.
36. Complete the following table by including the ionic compound formula and name:
Cl
Br
N
O
Na
Al
Ag
Zn
Be
37. Complete the following reactions by predicting the products, writing the chemical
equation, and net ionic equation:
a. Sodium sulfate + magnesium nitrate -->
b. Magnesium sulfate + beryllium nitrate -->
c. Calcium phosphate + sodium nitrate -->
d. HCl + lead(II) nitrate -->
e. Sodium hydroxide + calcium phosphate -->
39. Why must each cation in an ionic solid be surrounded by anions?
40. Why are there different coordination number for different solids?