The flashcards below were created by user
cturner297
on FreezingBlue Flashcards.
-
what is the first ionisation energy?
the energy required to remove one electron from each atom in a mole of atoms in the gaseous state
-
what is electron shielding?
its the repulsion between electrons in different inner shells. Shielding reduces the net attractive force from the nucleus of outer shell electrons
-
what is an atomic orbital?
a region within an atom that can hold up to two electrons with opposite spins
-
what is an ionic bond?
the electrostatic attraction between oppositely charged ions
-
what is a covalent bond?
they are formed by a shred pay of electrons
-
what is a dative covalent/ coordinate bond?
its a shred pair of electrons provided by one of the bonding atoms only
-
what is electro negativity?
its a measure of the attraction of a bonded atom for the pair of electrons in a covalent bond
-
what is a permanent dipole?
a small change difference across a bond that results in a difference in electronegaitivity's of the bonded atoms
-
what is a polar covalent bond?
has a permanent dipole
-
whats an intermolecular force?
an attractive force between neighbouring molecules
-
whats a permanent dipole-dipole?
a week attractive force between permanent dipoles in neighbouring polar molecules
-
what is van der waals'?
attractive force between induced dipoles on neighbouring molecules
-
what is a hydrogen bond?
- a strong dipole-dipole attraction between:
- 1. an electron deficient H atom on one more molecule
- 2. a lone pair of electrons on a highly electronegative atom on a different molecule
-
what is metallic bonding?
the electrostatic attraction between positive metal ions and delocalised electrons
-
what is a simple molecular lattice?
3D structure of molecules bonded by weak intermolecular forces
-
what is a giant covalent lattice?
3D structure of atoms bonded by strong covalent bonds
-
what is periodicity?
its a trend in properties of elements that is repeated across each period
-
what is thermal decomposition?
breakdown of chemical substances, using heat, into at least two chemical substances
-
what is a displacement reaction?
more reactive element displaces a less reactive element
-
what is a disproportionation reaction?
oxidation and reduction of the same element in a redox reaction
|
|