Beryllium’s atomic mass is 9, and its atomic number is 4. How many protons are found in a beryllium atom?
A. 9
B. 13
C. 4
D. 5
Answer:A
Beryllium’s atomic mass is 9, and its atomic number is 4. How many protons are found in a beryllium atom?
A. 9 B. 13 C. 4 D. 5