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A, B, C are three elements with atomic n...

A, B, C are three elements with atomic numbers, `Z-1, Z " and " Z + 1` respectively. B is an inert gas. Answer the follwing questions.
Which of the three has least value of ionization energy?

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Knowledge Check

  • Three elements X , Y and Z have atomic numbers 19 , 37 and 55 respectively . Then the correct statements (s) is / are

    A
    Their ionisation potential would increase with increasing atomic numbers
    B
    Y would have an ionisation potential between those X and Y
    C
    Y would have the highest ionisation potential
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    Z would have the highest ionisation potential

  • There are four elements 'p','q','r' and 's' having atomic numbers Z-1,Z,Z+1 and Z+2 respectively.If the element 'q' is an inert gas, select the correct answers from the following statements. (i)'p' has most negative electron gain enthalpy in the respective period. (ii)'r' is an alkali metal (iii)'s' exists in +2 oxidation state.

    A
    (i) and (ii) only
    B
    (ii) and (iii) only
    C
    (i) and (iii) only
    D
    (i),(ii) and (iii)

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