Calculate the number of neutrons present in the nucleus of an element X which is represented as `""_(15)^(31)X`.

Calculate the number of neutrons present in the nucleus of an element X which is represented as .^(31)X_(15) .

Calculate the number of Neutrons present in the nucleus of an /element 'X' which si represaented as _15^31X .

Calculate the number of neutrons for the following elements: ""_15P^31

How many neutrons are present in the nucleus of Sodium ?

An element A is represented by ""_(18)^(31)A. Find the number of neutrons present in the nucleus of an atom of the element .