Classification Of Elements And Periodicity In Properties Ques 186
Question: The elements with atomic numbers 9, 17, 35, 53, 85 are all [KCET 2004]
Options:
A) Noble gases
B) Halogens
C) Heavy metals
D) Light metals
Show Answer
Answer:
Correct Answer: B
Solution:
These atomic no. gives the configuration $ ns^{2}np^{5} $ which are of halogen group or VIIth group.
