An atom has a mass number of 37 and atomic number 17. How many protons does it have?
Q. An atom has a mass number of 37 and atomic number 17. How many protons does it have?
A. 20
B. 54
C. 17
D. 21
Answer: 17
A. 20
B. 54
C. 17
D. 21
Answer: 17