a) K+.......1s²2s²2p⁶3s²3p⁶
b)Mg+2....1s²2s²2p⁶
c)S-2.......1s²2s²2p⁶3s²3p⁶
d) Cl-.......1s²2s²2p⁶3s²3p⁶
a) K+ b)Mg+2 c)S-2 d) Cl-
a)₁₉₋₁K⁺: 1s²2s²2p⁶3s²3p⁶
b) ₁₂₋₂Mg²⁺: 1s²2s²2p⁶
c)₁ ₆₊₂S²⁻: 1s²2s²2p⁶3s²3p⁶
d) ₁₇₊₁Cl⁻: 1s²2s²2p⁶3s²3p⁶
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a) K+.......1s²2s²2p⁶3s²3p⁶
b)Mg+2....1s²2s²2p⁶
c)S-2.......1s²2s²2p⁶3s²3p⁶
d) Cl-.......1s²2s²2p⁶3s²3p⁶
a) K+ b)Mg+2 c)S-2 d) Cl-
a)₁₉₋₁K⁺: 1s²2s²2p⁶3s²3p⁶
b) ₁₂₋₂Mg²⁺: 1s²2s²2p⁶
c)₁ ₆₊₂S²⁻: 1s²2s²2p⁶3s²3p⁶
d) ₁₇₊₁Cl⁻: 1s²2s²2p⁶3s²3p⁶