JAMB - Chemistry (2022 - No. 6)
How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?
18
20
37
17
הֶסבֵּר
The mass number = number of neutrons + atomic number.
number of neutrons = The mass number - atomic number.
number of neutrons = 37 - 17 = 20