Question

OR
Fluorine (atomic number 9) and Chlorine (atomic number 17) belong to group 17 of the
Periodic Table. Write the electronic configuration of these two elements. Which of these will
be more electronegative? Why​

Answer 1

Answer:

Fluorine

Explanation:

F is more electronegative than chlorine, in fact it is most electronegative element of the periodic table .

Reason - Small Atomic size jAnd more electron affinity of fluorine.....

Answer 2

The electronic configuration of Fluorine and Chlorine are 1s²2s² 2p⁵ and 1s²2s²2p⁶3s²3p⁵ respectively.

Fluorine shows much more electronegativity than Chlorine.

The reason why fluorine shows more electronegativity than chlorine is as follows:

• Both chlorine and fluorine are from group 17 of a modern periodic table.
• Group 17 is referred to as "Halogens". We all know, down a group, electronegativity decreases.
• The property of an element to attract bonded electrons towards itself is known as electronegativity.
• Fluorine is much smaller than chlorine in size. This makes the high attraction of electrons by the atomic nucleus in the case of Fluorine than Chlorine.
• Not only that electronic repulsion is much more in fluorine for which it prevents the incoming of any electrons from outside.

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