Alkali metals cannot make carbides except:
Correct answer: C. Li
- A. Cs
- B. Na
- C. Li
- D. K
Explanation
Li more closely resembles the metals of group 2 than the metals of its own group (1). It is more reactive with carbon, nitrogen and hydrogen and less reactive with water, oxygen and halogens. Li forms a carbide (Li2C2) similar to that of calcium.
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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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