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The atomic number of a is 17. On the bas...

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.

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