Final answer:
The molecule AX5E has a total of 6 electron domains, which include 5 bonding domains represented by the 5 'X' atoms and 1 domain from the lone pair of electrons represented by 'E'.
Step-by-step explanation:
The total number of electron domains in the molecule AX5E represents the total number of areas around the central atom where electrons are likely to be found. This includes bonding pairs of electrons which are shared with other atoms and lone pairs of electrons that are not involved in bonding. In AX5E, 'A' represents the central atom, 'X' represents the bonded atoms, and 'E' represents a lone pair of electrons.
In AX5E, there are five 'X' atoms bonded to the central 'A' atom, indicated by the subscript '5' beside 'X.' The 'E' denotes one lone pair of electrons. Hence, there are five bonding domains from the 'X' atoms and one additional domain from the 'E' lone pair, giving a total of:
5 bonding domains + 1 lone pair domain = 6 electron domains