Question:
Which one of the following group 2 element is the strongest reducing agent ?
Which one of the following group 2 element is the strongest reducing agent ?
Updated On: Jul 7, 2022
- Mg
- Ca
- Ba
- Sr
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The Correct Option is C
Solution and Explanation
Among the elements of alkaline earth metals, barium is the strongest reducing agent. On moving down the group, the atomic size increases. The electropositive character increases and the ionization enthalpy value decreases. Hence, reducing power also increases from Be to Ba.
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Concepts Used:
Group 1 Elements
Group one of alkali metals is s-block elements with just one electron in their s-orbital. They are are alkali metals. They are named so because of the alkaline nature of the hydroxides and oxides.
Alkali metals are characterized by one s-electron in the valence shell of their atoms.
Alkali metals have a corresponding [Noble gas] ns1 electronic configuration. They occupy the first column of the periodic table. Alkali elements are:
- Lithium(Li)
- Sodium(Na)
- Potassium (K)
- Rubidium (Ru)
- Cesium (Cs)
- Francium (Fr)
They have occupied successive periods from first to seven. Francium is a radioactive element with very low half-life.
Electronic Configuration:
- Alkali metals have one electron in their valence shell.
- The electronic configuration is given by ns1. For example, the electronic configuration of lithium is given by 1ns1 2ns1.
- They tend to lose the outer shell electron to form cations with charge +1 (monovalent ions).
This makes them the most electropositive elements and due to the same reason, they are not found in the pure state.