dienvy2707 4/14/2024 3:28:12 PM

Câu 8: Số nơtron có trong hạt nhân nguyên tử https://lh7-us.googleusercontent.com/UU0b4Jn3p5lt6Nifl_z_kXw12IbiGkf7oJVZErI_8EIBzmvyiu0CtXjTW1aRsTK1MbeGbx6I79ceA7gk_ubLOKguaJoFiMKCHspuK61iRwiC3jkgsRaGEklhyqSZTMrG7kRalGBeWk89roQ=s800  là 

        A. 6.         B. 14.         C. 20.         D. 8.