1) The electron configuration of Oxygen (8 electrons) a) 2,6 b) 8,2 c) 2,8,8,2 d) O 2) The electron configuration of Sodium (11 electrons) a) Na b) 23 c) 2,8,2 d) 2,8,1 3) The electron configuration of the element with atomic number 15 a) Phosphorus b) 2,8,5 c) 5,8,2 d) 2.1 e) P 4) The electron configuration of the element with atomic number 9 a) 2,8,4 b) 2,8,3 c) Magnesium d) Proton 5) The electron configuration of the element with the symbol K. a) 2,8,8,1 b) 39 c) 2,8,1 d) Electron 6) The electron configuration of Nitrogen. a) 2,5 b) 14 c) 17 d) 2,7 7) The electron configuration of the element with atomic number 20 a) 2,8 b) 2,8,8,2 c) Calcium d) Proton 8) The electron configuration of Lithium. a) Li b) 2,1 c) 2,5 d) 7 9) The electron configuration of Magnesium (atomic number 12) a) 2,8,8,6 b) Mg c) 2,8,2 d) Electron shell

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