Question

worksheet: chemical bonding - ionic & covalent
remember...
ionic bond between a metal and non - metal (m + nm)
covalent bond between a non - metal and non - metal (nm + nm)
part 1: determine if the elements in the following compounds are metals or non - metals. describe the type of bonding that occurs in the compound.

compound	element 1 (metal or non - metal?)	element 2 (metal or non - metal?)	bond type
nacl
so₂
ph₃
mgbr₂
cao
h₂o
k₂o
alf₃
o₂
cucl₂
no₂
co₂
hf
rb₂s
nbr₃
fe₂o₃
ccl₄

Explanation:

Step1: Recall metal - non - metal rules

Metals are on the left - side and middle of the periodic table, non - metals on the right. Ionic bonds form between a metal and a non - metal, covalent bonds between non - metals.

Step2: Analyze NaCl

Na (sodium) is a metal, Cl (chlorine) is a non - metal. So the bond type is ionic.

Step3: Analyze SO₂

S (sulfur) is a non - metal, O (oxygen) is a non - metal. So the bond type is covalent.

Step4: Analyze PH₃

P (phosphorus) is a non - metal, H (hydrogen) is a non - metal. So the bond type is covalent.

Step5: Analyze MgBr₂

Mg (magnesium) is a metal, Br (bromine) is a non - metal. So the bond type is ionic.

Step6: Analyze CaO

Ca (calcium) is a metal, O (oxygen) is a non - metal. So the bond type is ionic.

Step7: Analyze H₂O

H (hydrogen) is a non - metal, O (oxygen) is a non - metal. So the bond type is covalent.

Step8: Analyze K₂O

K (potassium) is a metal, O (oxygen) is a non - metal. So the bond type is ionic.

Step9: Analyze AlF₃

Al (aluminum) is a metal, F (fluorine) is a non - metal. So the bond type is ionic.

Step10: Analyze O₂

O (oxygen) is a non - metal. Since it's a diatomic molecule of the same non - metal, the bond type is covalent.

Step11: Analyze CuCl₂

Cu (copper) is a metal, Cl (chlorine) is a non - metal. So the bond type is ionic.

Step12: Analyze NO₂ (again)

N (nitrogen) is a non - metal, O (oxygen) is a non - metal. So the bond type is covalent.

Step13: Analyze CO₂

C (carbon) is a non - metal, O (oxygen) is a non - metal. So the bond type is covalent.

Step14: Analyze HF

H (hydrogen) is a non - metal, F (fluorine) is a non - metal. So the bond type is covalent.

Step15: Analyze Rb₂S

Rb (rubidium) is a metal, S (sulfur) is a non - metal. So the bond type is ionic.

Step16: Analyze NBr₃

N (nitrogen) is a non - metal, Br (bromine) is a non - metal. So the bond type is covalent.

Step17: Analyze Fe₂O₃

Fe (iron) is a metal, O (oxygen) is a non - metal. So the bond type is ionic.

Step18: Analyze CCl₄

C (carbon) is a non - metal, Cl (chlorine) is a non - metal. So the bond type is covalent.

Answer:

Compound	Element 1 (metal or non - metal)	Element 2 (metal or non - metal)	Bond Type
SO₂	S = non - metal	O = non - metal	covalent
PH₃	P = non - metal	H = non - metal	covalent
MgBr₂	Mg = metal	Br = non - metal	ionic
CaO	Ca = metal	O = non - metal	ionic
H₂O	H = non - metal	O = non - metal	covalent
K₂O	K = metal	O = non - metal	ionic
AlF₃	Al = metal	F = non - metal	ionic
O₂	O = non - metal	-	covalent
CuCl₂	Cu = metal	Cl = non - metal	ionic
NO₂	N = non - metal	O = non - metal	covalent
CO₂	C = non - metal	O = non - metal	covalent
HF	H = non - metal	F = non - metal	covalent
Rb₂S	Rb = metal	S = non - metal	ionic
NBr₃	N = non - metal	Br = non - metal	covalent
Fe₂O₃	Fe = metal	O = non - metal	ionic
CCl₄	C = non - metal	Cl = non - metal	covalent