Question

Find odd man out and state the reason...... Helium,Boron,Neon,Krypton

Answer 1

boron since it is not an inert element
hope this helps

Answer 2

Hey
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Out of the above elements, Boron is the odd one because the rest of the elements that are He, Ne and Kr are Noble gases i.e. they have their last shell complete whereas Boron doesn't has its valence shell complete.
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#Helper