A unipositive ion has 18 electron and mass number 39.
1)Find the no. of valence electrons in it.
2)is it a metal or non metal?
3) name the inner gas which has the same electronic configuration as the ion.
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Helium = 2 ; Neon = 2,8 ; Argon = 2,8,8 ; Krypton =2,8,18,8 ; Xenon = 2,8,18,18,8 ; Radon=2,8,18,32,18,8. All have completely filled electrons with valence electron 8.
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