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Q: Atoms of which of the following elements has more than one electron in its outermost shell?
  • A. Lithium
  • B. Sodium
  • C. Hydrogen
  • D. Beryllium
Correct Answer: Option D - (a) Electronic configuration of Lithium (Li₃)= 2, 1 (b) Electronic configuration of Sodium (Na₁₁) = 2, 8, 1 (c) Electronic configuration of Hydrogen (H₁) = 1 (d) Electronic configuration of Beryllium (Be₄) = 2, 2
D. (a) Electronic configuration of Lithium (Li₃)= 2, 1 (b) Electronic configuration of Sodium (Na₁₁) = 2, 8, 1 (c) Electronic configuration of Hydrogen (H₁) = 1 (d) Electronic configuration of Beryllium (Be₄) = 2, 2

Explanations:

(a) Electronic configuration of Lithium (Li₃)= 2, 1 (b) Electronic configuration of Sodium (Na₁₁) = 2, 8, 1 (c) Electronic configuration of Hydrogen (H₁) = 1 (d) Electronic configuration of Beryllium (Be₄) = 2, 2