18) How many protons, neutrons and electrons are present in the following atoms?
A. 7N15
B. 27Co60
C. 53I131
D. 82Pb207
Answer:A
18) How many protons, neutrons and electrons are present in the following atoms?
A. 7N15 B. 27Co60 C. 53I131 D. 82Pb207