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Monovalent sodium and potassium ions, divalent magnesium and calcium ions are found in
Monovalent sodium and potassium ions, divalent magnesium and calcium ions are found in
Updated On: Jul 28, 2022
- lipids
- biological fluids
- fats
- enzymes
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The Correct Option is B
Solution and Explanation
$Na , K , Mg$ and Ca are vital elements. Their ions are present in biological (body) fluids. $Na ^{+}$and $Ca ^{2+}$ ions are present mainly in extracellular region (outside the cell). On the other hand, $K ^{+}$and $Mg ^{2+}$ ions are found inside the animal cells.
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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.
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