Ionic Formula
Name of Ionic Compound
Al2O3
Aluminum Oxide
Element
Ba3N2
barium nitride
Cs2O
Cesium Oxide
CaO
calcium oxide

Noble gas
it becomes like
Ba
___Ba+2__
Xenon
At
___At-1__
Radon
O
___O-2__
Neon
Ga
___Ga+3__
Argon
Li2O
lithium oxide
Rb3N
Rubidium Nitride
Cs
___Cs+1__
Xenon
Na3N
sodium nitride
Bi
___Bi-3__
Radon
Ca3N2
Calcium nitride
Br
___Br-1__
Krypton
MgCl2
magnesium chloride
SrSe
Strontium selenide
Cs2S
Cesium sulfide
Al2S3
aluminum sulfide
Element A

ion formed
B
Na
P
P
Si
Po
As
Al
Mg
Element B
Ionic or Covalent
Write formula for
compound
Ionic Compound Name
N
covalent
BN
Se
Sr
S
C
Cl
Ca
I
At
ionic
Na2Se
Sodium Selenide
ionic
Sr3P2
Strontium Phosphide
covalent
P2S3
covalent
SiC
covalent
PoCl2
ionic
Ca3As2
Calcium Arsenide
ionic
AlI3
Aluminum Iodide
ionic
MgAt2
Magnesium Astatide
 Remember that for ionic compounds, the positive ion or the element that is a metal always
comes first in the chemical formula and the compound name.
Write the chemical formula for the following ionic compounds:
a. Calcium Nitride
Ca3N2
b. Potassium Phosphide
K3P
c. Strontium Iodide
SrI2
d. Beryllium Phosphide
Be3P2
Sodium Nitride
Na3N
e.
Br-1 means that when the element Bromine combines with another element, it will:
A. gain one electron
B. loose one electron
C. gain one proton
D. gain 1 proton and loose 1 electron
Mg+2 means that when the element Magnesium combines with another element, it will:
A. gain two electrons
B. loose two electrons
C.
D. loose two protons
gain two protons
For the exam:
1) Know ‘ions’ and how they are formed – cations & anions.
2) Know how to determine if an element is a metal, nonmetal, or metalloid
3) Know how to determine when elements combine if they combine with ionic bonds or covalent bonds.
4) Know how to determine the chemical formula for ionic and covalent compounds.
5) Know how to determine the compound name for ionic compounds.
6) Study the lecture notes on Mrs. Shankles’ website titled “Chemical_Compounds_Bonds”.
a. there are multiple choice questions on the exam.