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10th Class Science Sample Paper Science Olympiad Model Test Paper-16

  • question_answer
    The electronic configuration of four elements A, B, C and D are as follows: A: 2, 8, 6                       B: 2, 8, 8 C: 2, 8, 8, 1                   D: 1, 7 Which two elements will combine to form an ionic bond?

    A) A and B

    B) B and C

    C) A and D

    D) C and D

    E) None of these

    Correct Answer: B

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