Unit 7 - atomic bonding

what is a stable electron configuration?

the valence electron shell is completely filled

What is ionic bonding?

to gain a stable configuration, they gain or lose their valence electrons to create a full outer shell

the ionic bond is due to the electrostatic attraction between oppositely charged ions

What is electronegativity?

a measure of the ability of an atom to attract a pair of electrons

What is covalent bonding?

gain a full outer shell by sharing the outer electrons

the strongest type of primary bonds

What is metallic bonding?

outer electrons delocalised to create a sea of electrons

high electrical and thermal conductivities

What are intermediate bonds?

mixture of 2 different bonding methods

silicon - covalently bonded but some electrons can leave localisation showing metallic bonding

basis for semi coductors

What are van der waals bonds?

weak, low melting points and low modulus

caused by dipoles where there is seperation between negative and positive regions of an atom. causing a coulobmbic attraction

What are hydrogen bonds?

strongest secondary boding type caused by permanent dipoles.

large difference in electronegativity between h and o,f,n