question_answer 55)

  Will and have different valencies? Justify your answer.

Answer:

  No,  and have same valency.  and  are the isotopes. So, they have same number of protons and electrons and have the same atomic number viz. 17 Hence, their electronic configuration and valencies are also the same K L M Electronic configuration = 2, 8, 7 Valency 8 -7 = 1 Therefore, both of them have valency = 1