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प्रश्न
Why alkaline earth metals are harder than alkali metals?
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.
Which one of the alkaline earth metal carbonates is thermally the most stable?
Discuss briefly the similarities between beryllium and aluminium.
Substantiate Lithium fluoride has the lowest solubility among group one metal fluorides.
Alkaline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergoes metal displacement reaction with AgNO3 solution to form compound (D). Identify A, B, C and D.
Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is ______.
Identify the correct formula of halides of alkaline earth metals from the following.
(i) BaCl2.2H2O
(ii) BaCl2.4H2O
(iii) CaCl2.6H2O
(iv) SrCl2.4H2O
Name an element from Group 2 which forms an amphoteric oxide and a water soluble sulphate.
Alkaline earth metals show ______.
MgBr2 and Mgl2 are soluble in acetone because of ______.
