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19 November, 23:12

The electron configurations of two unknown elements X and Y are shown. X: 1s^ 2 2s^ 2 2p^ 6 3s^ 1 Y: 1s^ 2 2s^ 1 Which statement is most likely correct about the two elements?

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Answers (2)
  1. 20 November, 00:55
    0
    This question is incomplete

    Explanation:

    X has an atomic number of 11 and hence it's sodium (Na) while Y has an atomic number of 3 and hence it is Lithium (Li). The atomic mass of X is 23 while that of Y is 7 X has three electron shells while Y has two electron shells X and Y cannot form a compound as there ions are both positively charged (cations). However, there ions both have a charge of + 1; hence are univalent positive metals. They are both metals and are found in group 1 of the periodic table The are highly reactive metals because they have just one electron in there outermost shell They react with halogens in group 7 to form salts They dissolve in water to form alkaline
  2. 20 November, 02:40
    0
    See below.

    Explanation:

    They both have 1 valency electron so will be metallic and in the same Group (Group 1) of the Periodic Table, so will have similar properties.
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