Question

Probabilities are used in the quantum mechanical model of the atom because of Heisenberg's Uncertainty Principle. This principle states that the _________ and ________ of an electron can be measured, but not simultaneously.

Answer 1

Answer: position, velocity

Step-by-step explanation:

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Answer 2

Position and momentum

Step-by-step explanation:

The Heisenberg uncertainty principle also called the uncertainty principle states that the position and momentum of a particular particle cannot be measured with precision at the same time.

It means that to determine either of the two properties, we have to do that at a later time and not at the same time. Doing both at the same time will not yield a correct value for the two.

The theory was put forward by a German physicist by the name Werner Heisenberg in the year 1927.