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प्रश्न
Why alkaline earth metals are harder than alkali metals?
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उत्तर
- The strength of metallic bonds in alkaline earth metals is higher than alkali metals due to the presence of 2 electrons in its outermost shell as compared to alkali metals, which have only 1 electron in the valence shell. Therefore, alkaline earth metals are harder than alkali metals.
- The alkaline earth metals have greater nuclear charge and more valence electrons, thus metallic bonding is more effective. Due to this, they are harder than alkali metals.
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संबंधित प्रश्न
Discuss the general characteristics and gradation in properties of alkaline earth metals.
Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
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Substantiate Lithium fluoride has the lowest solubility among group one metal fluorides.
Discuss the trend of the following:
Thermal stability of carbonates of Group 2 elements.
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Assertion (A): Beryllium carbonate is kept in the atmosphere of carbon dioxide.
Reason (R): Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is ______.
