Chemical Bonding Preview Page

Learning Outcomes 

Students should be able to:


Ionic bonding 

(a) describe the formation of ions by electron loss/gain in order to obtain the electronic configuration of a noble gas 

(b) describe the formation of ionic bonds between metals and non-metals, e.g. NaCl; MgCl2

(c) state that ionic materials contain a giant lattice in which the ions are held by electrostatic attraction, e.g. NaCl (candidates will not be required to draw diagrams of ionic lattices) 

(d) deduce the formulae of other ionic compounds from diagrams of their lattice structures, limited to binary compounds 

(e) relate the physical properties (including electrical property) of ionic compounds to their lattice structure. 

Covalent bonding 

(a) describe the formation of a covalent bond by the sharing of a pair of electrons in order to gain the electronic configuration of a noble gas 

(b) describe, using ‘dot-and-cross’ diagrams, the formation of covalent bonds between non-metallic elements, e.g. H2; O2; H2O; CH4; CO2 

(c) deduce the arrangement of electrons in other covalent molecules 

(d) relate the physical properties (including electrical property) of covalent substances to their structure and bonding.   Metallic bonding 

(a) describe metals as a lattice of positive ions in a ‘sea of electrons’ 

(b) relate the electrical conductivity of metals to the mobility of the electrons in the structure.


Structure and Properties of Material 

(a)compare the structure of simple molecular substances, e.g. methane; iodine, with those of giant molecular substances, e.g. poly(ethene); sand (silicon dioxide); diamond; graphite in order to deduce their properties

(b) compare the bonding and structures of diamond and graphite in order to deduce their properties such as electrical conductivity, lubricating or cutting action (candidates will not be required to draw the structures) 

(c) deduce the physical and chemical properties of substances from their structures and bonding and vice versa.


Sample Worksheet

Chemical bonding sample worksheet