In the quantum mechanical model, each allowed
has a precisely known
energy, but the location of the electron cannot be determined exactly, rather, the
probability of it being at a particular point in space is given by the probability density.
a)
subatomic particle
probability density

gas

explanation:

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water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

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