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An element X belongs to group 17 and thi...

An element X belongs to group 17 and third period of the periodic table
Write electronic configuration of the element. What is its valency?

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To solve the question, we will follow these steps: ### Step 1: Identify the Element The element X belongs to Group 17 and the third period of the periodic table. Group 17 elements are known as halogens. The halogens in the third period is chlorine (Cl). ### Step 2: Determine the Atomic Number Chlorine has an atomic number of 17. This means it has 17 electrons. ...
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Knowledge Check

  • An element belongs to group 15 and third period of the periodic table. Its electronic configuration will be

    A
    `1s ^(2) 2s ^(2) 2p ^(3)`
    B
    `1s ^(2) 2s ^(2) 2p ^(4)`
    C
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  • An element X belongs to group 17 and 2nd period of the periodic table. Its atomic number will be

    A
    `9`
    B
    `14`
    C
    `7`
    D
    `15`

  • An element which belongs to third period and group 16 in the periodic table has electronic configuration

    A
    `1s^2,2s^22p^6,3s^23p^3``
    B
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    C
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