What is the atomic number of an element whose cation Y+ has the electronic configuration 1s22s22p6?
9
10
11
12
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Discussions (16)
The answer is A not B
Because when it is + it loses electrons and when it is - it gains electrons
MySchool, the correct option is 'B', the charge of the atom affects the electrons and not the Protons (A.N).
The answer is 11 oo, it was stated that it was the cation itself with the 1S2 2S2 2P6, meaning the element had a neutral state of 11, before it lost an electron.
It's the no of electron that change not the no of proton which is the atomic number. In Y+ - no of electron is 10-1=9 , while the number of proton is still 10
guys....the number of electrons loss or gain doesnt affect the proton or atomic number....answer is 10
the answer is 10
we consider the number of protons not the electrons
the question was what is the atomic number not the electron
The answer was supposed to be 10 from the electronic configuration but since it is Y+ which means it donates just one electron to be positive. So it's atomic number is 11. C is correct 
Since the element carried + charge it should be 9 cause the element tend to lose not gain
Eletron dosent affect proton and they asked for atomic number which is equal to the number of proton so even after donating its electron the proton still remains intact so B is the correct answer
