Answer: The number of neutrons an iodine element contain are 74.
Step-by-step explanation:
Atomic number is defined as the umber of protons or number of electrons. It is represented as Z.
Atomic number = Number of protons = Number of electrons.
Mass number is defined as the sum of number of protons and number of neutrons. It is represented as A.
Mass number = Number of protons + Number of neutrons
In the given representation, atomic number is written on the top left corner and mass number is written below the symbol of the element.
Atomic number = 53 = Number of protons
Mass number = 127 = Number of neutrons + 53
Number of neutrons = 127 - 53 = 74
Hence, the number of neutrons an iodine element contain are 74.