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The electronic configuration of an eleme...

The electronic configuration of an element 'X' is 2, 8, 6. To which group and period of the modern periodic table does 'X' belongs ? State its valency and justify your answer in each case.

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The element 'X' with electronic configuration 2, 8, 6 (Z = 16) is sulphur. It is placed in group 16 of the modern periodic table. lnfact the element with configuration 2, 8, 8 is a noble gas Argon (Ar) and is present in group 18. Therefore, sulphur is placed in group 16 i.e. two places to the left valency of the element (X) : 2(8 - 6)
`therefore` The element X (sulphur) is divalent in nature.
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The electronic configuration of an element 'X' is 2, 8, 8, 2. To which (a) period and (b)group of the modern periodic table does 'X' belong? State its valency. Justify your answer in each case.

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Knowledge Check

  • If the electronic configuration of an element is 2,8,2, to which period of the Modem Periodic Table does it belong?

    A
    2
    B
    3
    C
    12
    D
    4

  • The electronic configuration of an element M is 2,8,4. In modern periodic table, the element M is placed in

    A
    `4^(th)` group
    B
    `2^(nd)` group
    C
    `14^(th)` group
    D
    `18^(th)` group

  • The electronic configuration of the atom of an element X is 2,8,4. In modern periodic table, the element X is placed in

    A
    `2^(nd)` group
    B
    `4^(th)` group
    C
    `14^(th)` group
    D
    `8^(th)` group

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