Determine electron if the uncertainty in velocity, Chemistry

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For an electron if the uncertainty in velocity is Δ v , the uncertainty in its position( Δ x ) is given by:

(1) hm/ 4 Π Δ b

(2) 4 Π / hm Π v

(3) h/ 4 Π Π b

(4) 4 Π m / h Δ v

ans: h/ 4 Π Δ b

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