What of the eight elements in the table is most likely to form a positive ions and why?

What of the eight elements in the table is most likely to form a positive ions and why?
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A determinant of second order is made with the elements 0, 1. What is the probability that the determinant is positive? -Maths 9th

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Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity of all elements is negative

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For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal (i) Of a stiffness matrix must be positive (ii) Of a stiffness matrix must be negative (iii) Of a flexibility matrix must be positive (iv) Of a flexibility matrix must be negative The correct answer is (A) (i) and (iii) (B) (ii) and (iii) (C) (i) and (iv) (D) (ii) and (iv)

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