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14 December, 22:07

An element x is found to have a mass number of 31 and atomic number of 17. idenrify the group and the period to which it belongs?

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  1. 15 December, 00:34
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    Well atomic number 17 is Chlorine, which is most commonly found as a gas, and is period 7.

    Explanation:

    elements found on period 7 are some of the most unstable elements.
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