Chapter 4

Write the formula of each of the following: a. oxygen difluoride b. boron trichloride c. dinitrogen trioxide d. sulfur hexafluoride

Write the formula of each of the following: a. sulfur dibromide b. carbon disulfide c. tetraphosphorus hexoxide d. dinitrogen pentoxide

Name each of the following ionic or covalent compounds: a. ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$ antiperspirant b. ${\mathrm{CaCO}}_3$ antacid c. ${\mathrm{N}}_2{\mathrm{O}}^{\text{" }}$ laughing gas," inhaled anesthetic d. ${\mathrm{Na}}_3{\mathrm{PO}}_4$ cathartic e. ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$ fertilizer f. ${\mathrm{Fe}}_2{\mathrm{O}}_3$ pigment

Name each of the following ionic or covalent compounds: a. ${\mathrm{N}}_2$ Earth's atmosphere b. ${\mathrm{Mg}}_3{\left({\mathrm{PO}}_4\right)}_2$ antacid c. ${\mathrm{FeSO}}_4$ iron supplement in vitamins d. ${\mathrm{N}}_2{\mathrm{O}}_4$ rocket fuel e. ${\mathrm{Cu}}_2\mathrm{O}$ fungicide f. ${\mathrm{NI}}_3$ contact explosive

Describe the trend in electronegativity going from left to right across a period.

Describe the trend in electronegativity going down a group.

Using the periodic table, arrange the atoms in each set in order of increasing electronegativity. a. $\mathrm{Li},\mathrm{Na},\mathrm{K}$ b. $\mathrm{Na},\mathrm{Cl},\mathrm{P}$ c. Se, $\mathrm{Ca},\mathrm{O}$

Using the periodic table, arrange the atoms in each set in order of increasing electronegativity. a. $\mathrm{Cl},\mathrm{F},\mathrm{Br}$ b. $\mathrm{B},\mathrm{O},\mathrm{N}$ c. $\mathrm{Mg},\mathrm{F},\mathrm{S}$

Predict whether each of the following bonds is ionic, polar covalent, or nonpolar covalent: a. $\mathrm{Si}-\mathrm{Br}$ b. $\mathrm{Li}-\mathrm{F}$ c. $\mathrm{Br}-\mathrm{F}$ d. $I-I$ e. $\mathrm{N}-\mathrm{P}$ f. $\mathrm{C}-\mathrm{O}$

Predict whether each of the following bonds is ionic, polar covalent, or nonpolar covalent: a. $\mathrm{Si}-\mathrm{O}$ b. $\mathrm{K}-\mathrm{Cl}$ c. $\mathrm{S}-\mathrm{F}$ d. $\mathrm{P}-\mathrm{Br}$ e. $\mathrm{Li}-\mathrm{O}$ f. $\mathrm{N}-\mathrm{S}$