biology Flashcards
revision
Ionic bond
Between a metal (loses electron(s)) and non-metal (gains electron(s))
Chemical Formula
Number of each type of atom present in an element or compound
Covalent bond
One shared pair of electrons (between non-metal atoms)
Molecule
Two or more atoms joined with covalent bond(s)
Lattice
Regular arrangement of closely packed particles
Electrostatic
attraction
Force between opposite charges (+ & -)
Intermolecular
forces
Weak forces between particles
Solubility
Whether and to what extent a substance dissolves
Conductivity
Transfer of heat / charged particles
Conductivity
Transfer of heat / charged particles
Malleable
Hammered into shape
Ductile
Drawn into wires
Graphite
Giant covalent molecule of carbon. Each carbon bonded to 3 other carbons in layers with non bonded electrons delocalised between layers
Diamond
Giant covalent molecule of carbon. Each carbon bonded to 4 other carbons.
Fullerene
Simple molecules of carbon with a finite number of carbons in each molecule e.g. Buckminsterfullerene, C60