easy · MCAT chem-phys
In an experiment measuring the ease of forming cations, a scientist finds that Cesium (Z = 55) ionizes more easily than Potassium (Z = 19).
This trend is best explained by which of the following?
- Potassium has more inner electrons to shield the valence shell from the nucleus.
- Potassium is closer to the noble gas Helium, giving it a more stable configuration.
- Cesium has a higher electronegativity, which makes it want to lose electrons.
- Cesium has a larger atomic radius, resulting in its valence electrons being further from the nucleus.
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