why oxygen show its valency as two 2,6
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Oxygen has a valence value of 2. Since it is 2,6, it only requires 2 more electrons to complete it is an octet. Even for elements with n= 1,2,3 and 4 electrons in the outer shell the valence is equal to n but for elements with n= 5,6 and 7 electrons in the outer shell the valence is equal to 8-n.
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Explanation:
The valency of oxygen is 2, because it needs two atoms of hydrogen to form water. Ammonia which is NH 3 , One atom of nitrogen combines with 3 atoms of hydrogen.
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