Question

# Which of the following has a octet/duplet electronic configuration?

A
B3
B
B
C
B3+
D
B2+

Solution

## The correct option is C B3+The atomic number of Boron =5 Electronic configuration of Boron is: [He] 2s2 2p1  Configuration of valence shell: 2s2 2p1  It does not have a complete octet. a) B3−  Electronic configuration of B3− (with 8 electrons) is: [He] 2s2 2p4 Configuration of valence shell: 2s2 2p4 It does not have a complete octet.  b) B−  Electronic configuration of B− ( with 6 electrons) is: [He] 2s2 2p2 Configuration of valence shell: 2s2 2p2 It does not have a complete octet. (c) B3+ Electronic configuration of B3+ (with 2 electrons) is: [He] Configuration of valence shell: 1s2 Boron is most likely to form  B3+ as it forms an inert gas electronic configuration of Helium (satisfying duplet).   (d) B2+ Electronic configuration of B2+ ( with 3 electrons) is: [He] 2s1 Configuration of valence shell: 2s1 It does not have a complete octet.Chemistry

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