Question

Based on its location on the periodic table, which metal is likely to be less reactive than rubidium and more reactive than calcium? potassium (K) cesium (Cs) magnesium (Mg) titanium (Ti)

Answer 1

Answer:

A

Explanation:

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Answer 2

Answer:

Potassium (K) is likely to be less reactive than rubidium and more reactive than calcium

Explanation:

• According to electrical configuration, there are 2 electrons in calcium but only 1 electron in the valence shell of potassium.
• Losing an electron from the outermost shell of potassium requires less energy because its ionization energy is lower than that of calcium as measured by ionization energy.
• Given that metallic properties rises from left to right and that metals have reducing properties, potassium is a better reducing agent than calcium. It also has a higher metallic properties than Calcium.
• Rubidium's valence shell electron (ns1) is more loosely bound than it is in potassium due to the latter's larger atomic size. Because of this, potassium has a higher ionization enthalpy than rubidium, making it less reactive.

Hence, option (A) is correct.

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