Understanding atomic and molecular concepts is crucial for pharmacy students because drug action, metabolism, and interactions hinge on the properties of atoms and molecules. Knowledge of atomic structure, mass spectrometry, and molecular mass helps pharmacy students comprehend how drugs are formulated, administered, and detected in the body. It also underpins the interpretation of analytical data and quality assurance of pharmaceutical products.

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And this 2 minute video from VolkScience.

And this 5 minute video from Khan Academy.

Understanding ionisation energy is important because it underpins the principles of drug chemistry. Many drugs must ionise to become active or to be absorbed effectively in the body. For instance, the ionisation state of a drug influences its solubility in blood plasma, its ability to cross cell membranes, and its interaction with target receptors. Knowledge of ionisation energies helps pharmacists predict how drugs will behave in different environments (e.g., in the acidic stomach vs. the more neutral bloodstream).

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Understanding electronic structure is essential for pharmacy students because the behaviour of drugs at the molecular level, such as binding to targets, solubility, and reactivity, depends on the arrangement of electrons. This knowledge allows pharmacists to predict drug interactions, optimise formulations, and understand mechanisms of action and toxicity. 

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Or you may prefer to watch this 12 minute video from Allery Chemistry