In a network of silica (SiO₂), each silicon atom is surrounded by _ atoms of oxygen
Correct answer: A. 4
- A. 4
- B. 2
- C. 1
- D. 6
Explanation
In the network structure of silica (SiO₂), each silicon atom is covalently bonded to four oxygen atoms in a tetrahedral arrangement, forming a continuous three-dimensional network. Each oxygen atom is shared between two silicon atoms. Option B (2) is incorrect as it refers to a linear coordination. Option C (1) is incorrect because silicon is not surrounded by only one oxygen atom. Option D (6) suggests an octahedral coordination, which does not apply to silicon in SiO₂.
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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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