chem-c3 bonding : ionic bonding and structure,metals and alloys,giant covalent structures

what state of matter are substances that consist of small molecules usually with what mp and bp

Substances that consist of small molecules are usually gases or liquids that have relatively low melting points and boiling points.

what is the structure of metals of atoms with what and why?

Metals have giant structures of atoms with strong metallic bonding meaning most metals have high melting and boiling points.

in pure metals what are atoms arranged in allowing what?

In pure metals, atoms are arranged in layers, which allows metals to be bent and shaped.

why are pure metals soft?

Pure metals are too soft for many uses and so are mixed with other metals to make alloys which are harder.

what type of forces do small molecules have

small molecules only have weak forces between the molecules (intermolecular forces).

what happen to the imf of small molecules when the substance melts or boils

It is these intermolecular forces that are overcome, not the covalent bonds, when the substance melts or boils.

as the imf inc w the size of molecules so larger molecules have what?

The intermolecular forces increase with the size of the molecules, so larger molecules have higher melting and boiling points.

do small molecules conduct electricity and why?

small molecules dont conduct electricity as the molecules do not have an overall electric charge.

size of polymers,linked by? the imf between them are how strong that they are solids at room tempp

Polymers have very large molecules. The atoms in the polymer molecules are linked to other atoms by strong covalent bonds. The intermolecular forces between polymer molecules are relatively strong and so these substances are solids at room temperature.

what structure is ionic compounds? with what forces of attraction and direction

Ionic compounds have regular structures (giant ionic lattices) in which there are strong electrostatic forces of attraction in all directions between oppositely charged ions.

why do ionic compound have high mp ?

These compounds have high melting points and high boiling points because of the large amounts of energy needed to break the many strong bonds.

why do ionic compounds conduct when melted/dissolveed in water

When melted or dissolved in water, ionic compounds conduct electricity because the ions are free to move and so charge can flow.

substances that consist of giant covalent structures are what with what properties?

Substances that consist of giant covalent structures are solids with very high melting points.

in giant covalent structures,what are they linked to and by what type of bonds?

All of the atoms in these structures are linked to other atoms by strong covalent bonds.

the bonds of giant covalent structures must be overcome to what?

These bonds must be overcome to melt or boil these substances.

give 2 e.g of giant covalent structures

Diamond and graphite (forms of carbon) and silicon dioxide (silica) are examples of giant covalent structures