Question
Define valency by taking examples of silicon and oxygen.
✓
Answer
Valency is the combining capacity of an atom.Atomic number of oxygen $= 8$
Atomic number of silicon $= 14 K L M$
Electronic configuration of oxygen $= 2 6$
Electronic configuration of silicon $= 2 8 4$
In the atoms of oxygen the valence electrons are 6 (i.e., electrons in the outermost shell). To fill the orbit, $2$ electrons are required. In the atom of silicon, the valence electrons are $4.$ To fill this orbit $4$ electrons are required.
Hence, the combining capacity of oxygen is $2$ and of silicon is $4.$
i.e., Valency of oxygen $= 2$
Valency of silicon $= 4$
Atomic number of silicon $= 14 K L M$
Electronic configuration of oxygen $= 2 6$
Electronic configuration of silicon $= 2 8 4$
In the atoms of oxygen the valence electrons are 6 (i.e., electrons in the outermost shell). To fill the orbit, $2$ electrons are required. In the atom of silicon, the valence electrons are $4.$ To fill this orbit $4$ electrons are required.
Hence, the combining capacity of oxygen is $2$ and of silicon is $4.$
i.e., Valency of oxygen $= 2$
Valency of silicon $= 4$
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