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chemistry help please ASAP

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how do I find two positive ions and two negative ions that are isoelectronic with

a) Ar

b) Xe

  • chemistry help please ASAP -

    Pick the element before (atomic number that is) and the element after Ar.
    Do the same for Xe.

  • chemistry help please ASAP -

    what is molarity of a solution by dissolving 10.0g of acetone, c3h6o, in enough water to make 125 ml of solution?

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