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The atomic number of Cl is 17. On the ba...

The atomic number of Cl 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.

Text Solution

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(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 `(CI^(-))` by gaining one electron.
(e) It form HCl with Hand NaCl with Na.
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