Transcript The Period 3 Oxides Summary Chart For Student Reference

The Period 3 Oxides
Element
Formula of
oxide
Structure
Reaction of oxide with water Acid/base
nature
Sodium*
Na2O
Giant Ionic
Na2O + H2O  2NaOH
Strongly basic
Magnesium*
MgO
Giant Ionic
Slight: MgO + H2O 
Mg(OH)2
Weakly basic
Aluminium
Al2O3
Giant Ionic
Amphoteric
Silicon
SiO2
Giant Covalent
(Metalloid)
Very weakly
acidic
Phosphorous*
P4O10
Molecular Covalent
Sulphur*
SO2
SO3
Molecular Covalent
no direct
reaction
but:
Cl2O7
Molecular Covalent
Chlorine
Argon
P4O10 + 6 H2O  4 H3PO4
Strongly acidic
Strongly acidic
SO3 + H2O  H2SO4
Strongly acidic
Cl2O7 + H2O  2 HClO4
no oxides
There is a gradual transition from basic to acidic character, reflecting a
gradual transition from metallic to non-metallic nature

Note: you will only be tested on the elements marked with an asterisk, *