Question

the special or element which have some numbers of ( A-2Z)are called is. ​

Answer 1

Answer:

The neutron number, symbol N, is the number of neutrons in a nuclide. Atomic number (proton number) plus neutron number equals mass number: Z + N = A. The difference between the neutron number and the atomic number is known as the neutron excess: D = N - Z = A - 2Z.