Melting points of Group II-A elements are higher than those of Group I-A because:
Correct answer: C. Atoms of II-A elements provide two binding electrons
- A. Atoms of II-A elements have smaller size
- B. II-A elements are more reactive
- C. Atoms of II-A elements provide two binding electrons
- D. I-A elements have smaller atomic radius
Explanation
Metallic character as well as melting and boiling increase until period number three because the number of free electrons available for forming a metallic bond increases, so strong metallic bonds are formed As a result, melting Melting/Boiling boiling increases. Group-IIA offers two electrons for bonding while Group-IA offers one electron for bonding so it means IIA forms a stronger metallic bond.
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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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