Card Set Information
Why metallic bond strength decreases down the group?
Atomic radius increase --> delocalised electrons futher away from the nuclear charge --> attraction decreases
Charge density decreases --> weaker metallic bond
Greater shielding effect
Colour of Cl
: pale green
: orange- brown
Example of smart materials?
Shape memory alloys
photochromic & thermochromic materials
Materials that can reversibly change in properties when conditions change
Crystal co-ordination numbers?
The number of anions around each cation in an ionic lattice and vice versa
A relatively strong intermolecular bond
A hydrogen atom joined to a very electronegative element in a molecule
Bonding to the another electronegative element in another molecule
The ability of an atom in a covalent bond to attract the electron pair
Formed by the attractions between positive ions and negative ions
A covalent bond where both electrons come from one of the atoms
Definition of covalent bond?
pair of electrons
Each atom gives one electron to the bonding pair of electron