Properties Of Period 3 Elements And Their Oxides Flashcards
(15 cards)
What happens when Na reacts with cold water
Fizzes on surface
Sodium burns with a… to produce a …
Yellow flame
White solid
Mg, Al, Si and P burn with a …
To give…
White flame
White solid smoke
S burns with a… to form an…
Blue flame
Acidic choking gas
What are the ionic oxides and their structures
The metal oxides Na2O, MgO, Al2O3 are ionic. They have giant
Why are they ionic?
Because if the large difference in electronegativity between the metal and O
What is the trend in m.p fib Na to Al and why
The increased charge if the cation makes the ionic forces stronger (bigger lattice tallies if dissociation) leading to increasing m.p
How do you prove compounds contain ions experimentally?
Melt the solids and show they conduct electricity
Which if the oxides is macromolecular? How does this relate to its m.p/b.p?
SiO2
Many string covalent bonds between atoms. High energy needed to break the many string covalent bonds.
What oxides are simple molecular?
Why are they covalent?
Why are the intermolecular forces weak?
Which one is bigger
P4O10 and SO2. Covalent because if the small electronegativity difference between non metal and O
P4O10 is bigger and therefore higher melting point
Why does aluminium metal not corrode easily in moist air?
Aluminium metal is protected from corrosion in moist air by a thing layer of aluminium oxide. The highly lattice strength of Al2O3 and its insolubility in water makes this layer impermeable to air and water
Metal ionic oxides react with water to form…
Hydroxides
What is the pH of the product when water reacts with Na2O and MgO
13 and 9
