gneet
Study Companion
For more NEET and AIIMS mcq on Structure of Atom
Visit www.gneet.com
Question
Q478) An element M has an atomic mass 19 and atomic number 9. Its ion is represented by ... [ manipal PMT 2001]
a) M
+
b) M
2+
c)M
-
d)M
2-
SOLUTION
When M accept one electron it attends the nobel gas configuration
Answer: (c)