Sodium reacts with water more vigorously than lithium because it:
Correct answer: C. Is more electropositive
- A. Has a higher atomic weight
- B. Is more electronegative
- C. Is more electropositive
- D. Is a metal
- E. Has a high melting point
Explanation
Sodium reacts more vigorously with water than lithium primarily because sodium is more electropositive. Electropositivity increases as you move down a group in the periodic table, which means sodium, being below lithium, loses electrons more easily. This increased tendency to lose electrons results in a more vigorous reaction with water. Other factors such as atomic weight, electronegativity, and melting point are not the primary reasons for this difference in reactivity. All alkali metals including sodium and lithium are metals, so this characteristic is not a differentiating factor either.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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