Multiple choice

The number of neutrons presents in an element having mass number 226 and atomic number 88 is

  1. 88

  2. 138

  3. 314

  4. 50

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The number of neutrons in an atom is calculated by subtracting the atomic number (number of protons) from the mass number (total nucleons). For this element: Neutrons = Mass number - Atomic number = 226 - 88 = 138. This element is Radium-226.