Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1,3, 5 and 7 electrons
Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1,3, 5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valencies. Write the molecular formula of the compound formed when P and S combine.
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Electronic configuration of Q = 2, 8,3
Valency of Q =3
Electronic Configuration of R = 2,8, 5
Valencyof R=8-5=3
Electronic configuration of P = 2,8,1
Electronic configuration of S=2,8,7
Formula : PS/NaCl
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