For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?
OA 13
OB. 14
OC 26
OD. 27
O E 40
Question
Question
For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?
OA 13
OB. 14
OC 26
OD. 27
O E 40
Answer:
14……………….
B. 14
Atomic mass is the addition of protons and neutrons. Atomic number is protons. If we subtract atomic number from mass, we get neutrons