How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?
A
18
B
20
C
37
D
17
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
The mass number = number of neutrons + atomic number.
number of neutrons = The mass number - atomic number.
number of neutrons = 37 - 17 = 20
Source: WAEC / JAMB / NECO Classroom Archive (Record #64905)