According to Heisenberg's uncertainty principle, it is impossible to determine simultaneously the exact position and momentum of particle like electronIf Δp=ΔxΔp⋅Δx≥4πh​(Δp)2≥4πh​Δp≥πh​​×21​mΔv≥πh​​×21​Δv≥πh​​×2m1​