how to find valency of an element by spdf
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Writing electronic configuration of an element using Aufbau principle is called spdf rule.
Thus the order of energy of an orbital is , 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s < 5f < 6d < 7p < 6f < 7d < …….
The valency is decided by the number of electrons in the valence shell. For ex., valency of nitrogen is either 3 or 5, carbon is 4, boron is 3.
IF IT IS CORRECT MARK BRAINLIEST ✌️
Thus the order of energy of an orbital is , 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s < 5f < 6d < 7p < 6f < 7d < …….
The valency is decided by the number of electrons in the valence shell. For ex., valency of nitrogen is either 3 or 5, carbon is 4, boron is 3.
IF IT IS CORRECT MARK BRAINLIEST ✌️
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