"The uncertainty<span> in </span>velocity<span> is Δv=1.05⋅105m/s . According to the Heisenberg </span>Uncertainty<span> Principle, you cannot measure simultaneously with great precision both the momentum and the position of a particle. m - the mass of an electron - 9.10938⋅10−31kg."
-socratic.com</span>
Aluminum is an element. If there's nothing else in the foil
besides aluminum, then the foil is entirely an element.
Because it has atomic no. = 1 (according to modern periidic table)
