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A di-positive ion has an electronic arra...

A di-positive ion has an electronic arrangement 2,8,8 . Find out the number of electrons, protons and neutrons in that element if its mass number is 40.

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(i) Calculation of the atomic number of the element.
(ii) Calculation of the number of electrons in a neutral atom based on the configuration of positive ion.
(iii) The atomic number of a neutral atom
(iv) The number of neutrons in a neutral atom based on mass number.
(v) 20,20,20
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Knowledge Check

  • The number of protons , electrons and neutrons in tritium are

    A
    `1:1:0`
    B
    `1:1:1`
    C
    `1:1:2`
    D
    `1:2:1`

  • The number of electrons and neutrons of an element is 18 and 20 respectively . Its mass number is

    A
    17
    B
    37
    C
    2
    D
    38

  • Number of protons, neutrons and electrons in the element ""_89^231 Y is.

    A
    `89, 231, 89`
    B
    `89, 89, 242`
    C
    `89, 142, 89`
    D
    `89, 71, 89`

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