Question

The species which has its fifth ionisation potential equal to 340 V is

• A. B+
• B. C+
• C. B
• D. C

Answer 1

Answer: (C)

B

Answer 2

I.P. = 340 V so, I.E. = 340 eV = 13.6 $\frac{Z^{2}}{(1)^{2}}$

so, Z2 = 25

so, Z = 5

Therefore, (2) is correct option