ow many neutrons are in the tantalum isotope  ?

To determine the number of neutrons in a tantalum isotope, we need to know the specific isotope you're referring to. Tantalum (Ta) has an atomic number of 73, which means it has 73 protons. The number of neutrons is found by subtracting the atomic number from the atomic mass number (number of protons + number of neutrons).

For example, if you're referring to the most common isotope of tantalum, Tantalum-181, you would subtract 73 (number of protons) from 181 (atomic mass number) to get 108. So, Tantalum-181 has 108 neutrons.

If you're referring to a different isotope of tantalum, you would need to know its atomic mass number to calculate the number of neutrons.