Question

If atomic number of an inert gas is $Z$ then an element with which of the following atomic number will has highest $I.E.$

• A. $Z-2$
• B. $Z-1$
• C. $Z+1$
• D. $Z+2$

Answer 1

Answer: (B)

Atomic number of inert gas $=Z$
Second highest IE in a period = halogens $(Z-1)$