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प्रश्न
Define valency by taking examples of silicon and oxygen.
व्याख्या
उत्तर
Valency refers to the number of electrons obtained, lost, or shared to complete the octet of electrons in the valence shell.
Valency of silicon: It has electronic configuration → 2, 8, 4
Thus, 4 electrons are shared with other atoms to complete the octet, and so its valency = 4.
Valency of oxygen: It has electronic configuration → 2, 6
Thus, It will gain 2 electrons to complete its octet. So its valency = 2.
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