The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. What is the mass number of sodium?
A. 11
B. 22
C. 23
D. 34
Answer:C
The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. What is the mass number of sodium?
A. 11 B. 22 C. 23 D. 34