Question

ionic or molecular?

1. identify the types of atoms in each compound as either metal or non - metal. then decide if the compound is ionic or molecular. use the periodic table on page 148 to help you.

chemical formula	metal or non - metal elements?	ionic or molecular compound?
b) p₂o₃
c) scl₂
d) cbr₄
e) rb₂s

1. identify the following compounds as ionic or molecular. then write the names of the compounds

chemical formula	ionic or molecular?	compound name
b) bacl₂
c) sf₆
d) brcl
e) naf
f) mgo
g) pf₅
h) n₂o₃
i) agcl
j) li₂se

1. identify the following compounds as ionic or molecular. then write their chemical formulas

compound	ionic or molecular?	compound formula
b) zinc oxide
c) potassium bromide
d) dinitrogen pentoxide
e) aluminum sulfide
f) phosphorus trichloride
g) disulfur dinitride
h) magnesium phosphide
i) lithium iodide
j) diphosphorus hexoxide

Explanation:

Step1: Recall compound - type rules

Ionic compounds form between metals and non - metals. Molecular compounds form between non - metals only.

Step2: Analyze compounds in part 1

a) SrCl₂

Sr (strontium) is a metal, Cl (chlorine) is a non - metal. So it is an ionic compound.

b) P₂O₃

P (phosphorus) and O (oxygen) are non - metals. So it is a molecular compound.

c) SCl₂

S (sulfur) and Cl (chlorine) are non - metals. So it is a molecular compound.

d) CBr₄

C (carbon) and Br (bromine) are non - metals. So it is a molecular compound.

e) Rb₂S

Rb (rubidium) is a metal, S (sulfur) is a non - metal. So it is an ionic compound.

Step3: Analyze compounds in part 2

a) CO

C (carbon) and O (oxygen) are non - metals. It is a molecular compound, named carbon monoxide.

b) BaCl₂

Ba (barium) is a metal, Cl (chlorine) is a non - metal. It is an ionic compound, named barium chloride.

c) SF₆

S (sulfur) and F (fluorine) are non - metals. It is a molecular compound, named sulfur hexafluoride.

d) BrCl

Br (bromine) and Cl (chlorine) are non - metals. It is a molecular compound, named bromine monochloride.

e) NaF

Na (sodium) is a metal, F (fluorine) is a non - metal. It is an ionic compound, named sodium fluoride.

f) MgO

Mg (magnesium) is a metal, O (oxygen) is a non - metal. It is an ionic compound, named magnesium oxide.

g) PF₅

P (phosphorus) and F (fluorine) are non - metals. It is a molecular compound, named phosphorus pentafluoride.

h) N₂O₃

N (nitrogen) and O (oxygen) are non - metals. It is a molecular compound, named dinitrogen trioxide.

i) AgCl

Ag (silver) is a metal, Cl (chlorine) is a non - metal. It is an ionic compound, named silver chloride.

j) Li₂Se

Li (lithium) is a metal, Se (selenium) is a non - metal. It is an ionic compound, named lithium selenide.

Step4: Analyze compounds in part 3

a) carbon dioxide

C and O are non - metals. It is a molecular compound, formula CO₂.

b) zinc oxide

Zn (zinc) is a metal, O (oxygen) is a non - metal. It is an ionic compound, formula ZnO.

c) potassium bromide

K (potassium) is a metal, Br (bromine) is a non - metal. It is an ionic compound, formula KBr.

d) dinitrogen pentoxide

N and O are non - metals. It is a molecular compound, formula N₂O₅.

e) aluminum sulfide

Al (aluminum) is a metal, S (sulfur) is a non - metal. It is an ionic compound, formula Al₂S₃.

f) phosphorus trichloride

P and Cl are non - metals. It is a molecular compound, formula PCl₃.

g) disulfur dinitride

S and N are non - metals. It is a molecular compound, formula S₂N₂.

h) magnesium phosphide

Mg (magnesium) is a metal, P (phosphorus) is a non - metal. It is an ionic compound, formula Mg₃P₂.

i) lithium iodide

Li (lithium) is a metal, I (iodine) is a non - metal. It is an ionic compound, formula LiI.

j) diphosphorus hexoxide

P and O are non - metals. It is a molecular compound, formula P₂O₆.

Answer:

Chemical formula	Metal or non - metal elements?	Ionic or molecular compound?
P₂O₃	Non - metal (P), Non - metal (O)	Molecular
SCl₂	Non - metal (S), Non - metal (Cl)	Molecular
CBr₄	Non - metal (C), Non - metal (Br)	Molecular
Rb₂S	Metal (Rb), Non - metal (S)	Ionic

Chemical formula	Ionic or molecular?	Compound name
BaCl₂	Ionic	Barium chloride
SF₆	Molecular	Sulfur hexafluoride
BrCl	Molecular	Bromine monochloride
NaF	Ionic	Sodium fluoride
MgO	Ionic	Magnesium oxide
PF₅	Molecular	Phosphorus pentafluoride
N₂O₃	Molecular	Dinitrogen trioxide
AgCl	Ionic	Silver chloride
Li₂Se	Ionic	Lithium selenide

Compound	Ionic or molecular?	Compound formula
zinc oxide	Ionic	ZnO
potassium bromide	Ionic	KBr
dinitrogen pentoxide	Molecular	N₂O₅
aluminum sulfide	Ionic	Al₂S₃
phosphorus trichloride	Molecular	PCl₃
disulfur dinitride	Molecular	S₂N₂
magnesium phosphide	Ionic	Mg₃P₂
lithium iodide	Ionic	LiI
diphosphorus hexoxide	Molecular	P₂O₆