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  4. The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

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Q. The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

EAMCETEAMCET 2003

Solution:

The electronic configuration of atom having atomic number 35 is: $ =1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10,}}4{{s}^{2}}4{{p}^{5}} $ The total number of p-electrons are = 6 + 6 + 5 = 17electrons