gneet
Study Companion
For more NEET and AIIMS mcq on Structure of Atom
Visit www.gneet.com
Question
Q402) Number of protons, neutrons and electrons in the element
89
X
231
is ...{AFMC 1997]
a) 89, 89, 242
b) 89, 142, 89
c)89, 71, 89
d)89, 231, 89
SOLUTION
Answer: (b)
