The atomic number of a is 17. On the basis of this information, answer the questions that follow : (a) Write the electronic configuration of Cl. (b) Find the valency. (c) To which group does it belong ? (d) Identify the type of ion it will form. (e) Write down the formula of the compound it forms with other elements.

The atomic number of a is 17. On the basis of this information, answer

1.	The atomic number of a is 17. On the basis of this information, answer the questions that follow : (a) Write the electronic configuration of Cl. (b) Find the valency. (c) To which group does it belong ? (d) Identify the type of ion it will form. (e) Write down the formula of the compound it forms with other elements.
Answer» Solution :(a) Electronic configuration of Cl is 2, 8, 7. (b) VALENCY of Cl is 1 as it requires only one electron to complete its OCTET. (C) It belongs to GROUP 17 of the modem Periodic Table. (d) It will form an ANION `(Cl^(-))` by gaining one electron. (e) It form HCl with Hand NaCl with Na.