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An atom of an element 'X' has three com...

An atom of an element 'X' has three completely filled shell . The ratio of electrons in 1 and 4 shells is `1 : 1`. Find the atomic number of 'X' . Also write the formulae of its bicarbonate , chromate and phosphide.

Text Solution

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The electronic arrangement of X must be 2 , 8 , 18 , 2 So the atomic number of X ahould br 30 . The element X is Zn which can form `Zn^(+2)` ion by losing 2 electrons from N shell.
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An atom of an element X has three completely filled shells. The ratio of electrons in 1 and 4 shells is 1 : 1. Find the atomic number of X. Also write the formulae of its bicarbonate, chromate and phosphide.

An atom of an element has 4th shell as the valence shell. The difference between electrons present in L and M and N shells are 1 and 0 respectively. Find the atomic number of an element.

Knowledge Check

  • The number of electrons in the M shell of the element with atomic number 24 is

    A
    24
    B
    12
    C
    13
    D
    8

  • The number of electrons in 3d shell foe element with atomic number 26 is

    A
    4
    B
    6
    C
    8
    D
    10

  • The ratio of number of electrons in N shell of A and M shell of B atomic numbers 40 and 32 respectively is

    A
    `5:3`
    B
    `9:5`
    C
    `5:9`
    D
    `5:4`

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