Question

\The electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below.

Which of the following symbols represents a chlorine ion with a stable arrangement of eight valence electrons?
A. 35Cl1-
B. 35Cl2-
C. 35Cl1+
D. 35Cl

Answer 1

Chlorine has 17 electrons

Lets look at Electronic configuration

`\\ \bull\sf\dashrightarrow 1s^22s^22p^63s^23p^5`

• It require 1 electron to become Argon.

Required configuration should be

`\\ \bull\sf\dashrightarrow 1s^22s^22p^63s^23p^6`

Now

Symbol will be

`\\ \bullet\sf\dashrightarrow {}_(35)Cl^(1-)`

Option A is correct