3.5/3.6 Metallic Bonding & Giant Covalent Compounds

Define metallic bonding.

attr between +ve ions & moving sea of delocalised es

Properties of Pure Metals
1. Close together in a __ pattern
2. Layer arr. allows changing __ when force applied
3. Layers can slip & slide over each other

regular, shape

Properties of Alloys
1. __ of metal with another element
2. d__ arr. of atoms
3. __ {difficulty} for atoms to slide past another (stronger)

mixture, disrupted, harder

Properties of Metals
1. Varying __ & b.p.
2. Conducts __
3. Malleable & d__ (can be drawn into wire)
4. __ (shiny)
5. Usually __ {colour} (except copper & gold)

m.p., electricity, ductile, lustrous, grey

Define a macromolecular solid.

giant structure of very large molecules covalently bonded together

Define allotrope.

diff phys form of the same element

Diamond
> C has __ val. ēs & forms covalent bonds
> hard, insoluble in __
> 3D network solid: t__

4, water, tetrahedral

Quartz (__)
> __ silicon val. ēs covalently bonded to __ {element} atoms

SiO2, 4, O

Graphite
> Layers of C atoms joined in __ ring, each joined to __ others
> Strong covalent bonds __ C atoms
> Weak IMF between __ (van der Waals)
> s__, __D network solid
> Conducts __ bc the 4th val. e found between layers & can move to carry charge from atom → atom
> Insoluble in __
> Used as __ bc it slides over one another

hexagonal, 3, between, layers, soft, 2, electricity, water, lubricant

C__ - Buckminsterfullerene
> Arranged in hollow __
> Nanotube structure can be used as container to transport __ in body
> Strong & semiconductors in electrical circuits

60, sphere, drugs