Question

An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be

• A. 26
• B. 30
• C. 36
• D. 56

Answer 1

Answer: (B)

30

Answer 2

$26 ⥂ X^{56}$ $A = P + N = Z + N = E + N$

$N = A - E = 56 - 26 = 30$