How many electrons are present in valence shell of Y with atomic no. 15
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Answer:
Y=Phosphorous
At. No. = 15
5 electrons are present.
Explanation:
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=5 electrons are present in valence
shell of Y with atomic no. 15
*phosphorus has atomic number 15
phosphorus belongs to Group 5A and period 3 of the periodic table.
*Its valence electrons should be 5.
*the electron configuration
1s² 2s² 2p⁶ 3s² 3p³=15
*electrons = number of P
*The outer most orbital, 3s² 3p³
* it contains 5 electrons
=thus valence electrons for p is 5
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