Ion Formation
Elements in this group have 5 valence electrons
group 15 or 5A
Why are the melting points of ionic compounds high?
Attractive forces between opposite ions are strong, need a lot of energy (heat) to overcome it
K, I
KI
Sr, Cl
SrCl2
Mg
Mg2+
Rb
Rb+
Dot Structure for Potassium
One dot
The structure of an Ionic Compound is called a
Crystal Lattice
Elements in this group have a charge of 2+
Group 2 or 2A
Are forces of attraction in ionic compounds strong or weak?
strong
Ca, S
CaS
K, O
K2O
P
P3-
Sr
Sr2+
Dot Structure for Calcium
2 dots
Describe the way metals are bonded
Ions with a "sea" of electrons
Elements in this group have 3 valence electrons
group 13 or 3A
Which of these options describes ionic compounds when an external force is applied: a) malleable, b) ductile, c) brittle
Brittle
Na, S
Na2S
Be, S
BeS
Li
Li+
F
F-
Dot Structure for Oxygen
6 dots
A mixture of two or more metals
Alloy
These elements do not typically form ions
group 18 or 8A; or 14 or 4A
Ionic Compounds can conduct electricity during which two incidents?
Dissolved in Water (aqueous) and Molten
Ca, Cl
CaCl2
Al, N
AlN
Br
Br-
Se
Se2-
Dot Structure for Chlorine
7 dots
Why might alloys be used for materials over a pure metal?
More durable/ corrosion resistant
This group of elements forms -1 charge
group 17 or 7A
Ionic Compounds form a ______________ which is a repeating pattern
crystal lattice
Al, O
Al2O3
K, P
K3P
Al
Al3+
S
S2-
Dot Structure for Beryllium
2 dots
Ionic Compounds are the attraction from a __________ and _____________.
Cation and Anion