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Alkali Metals

Sodium has a ...

Question

Sodium has a lower IP value and hence is highly metallic in nature. But, it is so soft that it can be cut with a knife. Iron is a hard metal, though its IP value is higher than that of sodium. Justify.

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Solution

Sodium belongs to Group I in the Modern Periodic Table, which consists of Alkali Metals. ... extremely reactive metals, the reactivity increasing as we go down the group. ... You can also find that Potassium is more softer than Sodium, Rubidium .... is not strong, therefore it can be cut through knife and hence is a soft metal.

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Q. The metal potassium (K) is so soft that it can be cut with a knife.

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