First slide

Electronic configuration and Atomic , physical properties

Question

Common oxidation states of halogens are

Easy

A

-1, + 1
B

-1, +1, +3
C

-1, +1, +3, +5
D

-1, +1, +3, +5, +7

Solution

Since they have seven valence electrons they gain one electron and show -1 state.
Ground state electronic configuration - ns² np⁵ -oxidation states (+1)
First excited state electronic configuration - ns² np⁴ (n-1)d¹ -oxidation states(+3)
Second excited state electronic configuration - ns² np³ (n-1)d² -oxidation states(+5)
Third excited state electronic configuration - ns¹ np³ (n-1)d³ -oxidation states(+7)

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