Topic 2: Drug Haul Analysis! Flashcards
What do Covalent bonds form between?
Non-Metals
What is the valency of an element?
The valency is the number of unpaired outer electrons.
Under what conditions do Ionic Lattices form?
Ionic Lattices form when a metal atom transfers its outer electrons to a non-metal atom, forming oppositely charges ions (One positive metal and one negative non-metal).
What is an aqueous solvent?
An solution in which the solvent (a substance which dissolves another to form a solution) is water.
What is a non-aqueous solvent?
A solution in which the solvent (a substance which dissolves another to form a solution) is not water.
What are the properties of a covalent molecule? (Melting points, Forces of attraction, Electrical conductivity, Solubility)
Covalent Molecular substances have low melting points, weak forces of attraction, do not conduct electricity due to no mobile electrons and tend to be more soluble in non-aqueous solvents.
What are the properties of a covalent network? (Melting points, Forces of attraction, Electrical conductivity, Solubility)
Covalent networks have high melting points, strong forces of attraction, do not conduct electricity in any state (Other than graphite) and are insoluble in any solvent.
What are the properties of an Ionic lattices? (Melting points, Forces of attraction, Electrical conductivity, Solubility)
An Ionic lattice have high melting points, strong forces of attraction, conduct electricity when molten or in solution and tend to be soluble in aqueous events.
What are the five most common covalent networks?
Carbon (Diamond and Graphite), Silicon, Boron, Silicon Oxide (Quartz) and Silicon Carbide.
Why don’t covalent molecules and covalent networks conduct energy in any state?
There are no mobile charged particles
Under what conditions do ionic lattices conduct electricity?
Ionic lattices conduct electricity when in solution or molten, as then they have mobile ions.
