Hydrogen resembles halogens in many respects. Which one of the following factors is most important in this respect?
Correct answer: B. Its tendency to gain a single electron in its valence shell to attain stable electronic configuration
- A. Its tendency to lose an electron to form a cation
- B. Its tendency to gain a single electron in its valence shell to attain stable electronic configuration
- C. Its electron-gain enthalpy value is low, i.e. only slightly negative
- D. Its small size
Explanation
The most significant similarity between hydrogen and the halogens is their electronic structure. Both hydrogen and the halogens are one electron short of a stable, filled valence shell (a duet for hydrogen, an octet for halogens), giving them a strong tendency to gain one electron.
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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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