ionic bonding and properties of substances Flashcards by Libby Entwhistle

Q

linear

A

2 bonds
Always between diatomic molecules.

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Q

pyrimdal

A

3 bonds

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Q

v-shaped

A

2 bonds

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Q

tetrahedral

A

4 bonds

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Q

ionic bonds

A

formed between metals and non-metals

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Q

ionic bonds are formed when

A

a metal transfers its electrons to a non-metal

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Q

when metal loses an electron

A

it becomes positive

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Q

when a non metal gains an electron

A

it becomes negative

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Q

ionic compounds exist as

A

ionic lattices when in a solid state

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Q

an ionic lattice consists of

A

positive and negative ions surrounded by ionic bonds.

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Q

the melting point tells us about

A

the strength of the bond being broken.

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Q

higher melting point =

A

stronger bonds

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Q

covalent molecules

A

low melting bond

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Q

inter -molecular is

A

the bond in molecules

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Q

intra molecular is

A

bonds between molecules

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Q

an example of a covalent molecular structure is

A

methane

Q

covalent networks

A

high melting point

Q

covalent networks are all

A

covalently bonded

Q

an example of a covalent network is

A

silicon dioxide

Q

ionic compounds

A

high melting point

Q

an example of an ionic compound

A

sodium chloride

Q

solubility

A

the ability of a solute to dissolve in a solvent

Q

most common solvent is

A

water

Q

solutions made by dissolving solutes in water make

A

aqueous solutions

if a solute can dissolve

soluble

if a solute can not dissolve

insoluble

ionic compounds

soluble in water

covalent

insoluble in water

metals

are conductors of electricity

most non-metals

are insulators of electricity

the 1 non-metal that can conduct electricity is

carbon

electricity

is the flow of charged particles

solid ionic

can't conduct as the ions aren't free to move

covalents can never

conduct

covalents can never

conduct

molten ionic

can conduct as the ions are free to move.

if a substance conducts in the solid state

it has metallic bonds

if a substance conducts in the solid state

it has metallic bonds

covalent networks

are always insoluble.