vero80
contestada

How many neutrons does element X have if its atomic number is 55 and its mass number is 165?_______ neutrons

Respuesta :

kilaann1
okay, the atomic number is the same as the number or protons. protons + Neutrons = mass number. so to find the number of Neutrons in this case, all you do is subtract, 165- 55. The answer is 110. 
Q&A Education