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Periodic classification 1

Quiz by REENA GOYAL

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5 questions
Show answers
  • Q1

                an element which is an essential constituent of all organic compounds belongs to

    group 1

    group 14

    group13

    group 17

    30s
  • Q2

    Which of the following gives the correct increasing order of the atomic radii of O, F and N ?

    F, O, N

     N, F, O 

    O, F, N 

    O, N, F

    30s
  • Q3

    Which among the following elements has the largest atomic radii? 

    Ca

    Na

    Mg

    K

    30s
  • Q4

    Electronegativity increases down a group.

    false
    true
    True or False
    30s
  • Q5

    Chemical reactivity of metals decreases across a period.

    true
    false
    True or False
    30s

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