PLEASE HELP ASAP: An unknown element, X, reacts with lithium to form the compound Li2X...
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PLEASE HELP ASAP: An unknown element, X, reacts with lithium to form the compound Li2X...

[From: ] [author: ] [Date: 12-03-30] [Hit: ]
the formula is Li2X,the ion is X2- elements in group 6A form monatomic ions with a 2- charge.......
An unknown element, X, reacts with lithium to form the compound Li2X. In other compounds this element also can accommodate up to 12 electrons rather than the usual octet. What element could X be?

Answer Choices:
A) Ba
B) O
C) Cl
D) Po

Please show work and explanations, as I am hopelessly lost.

-
OK, the formula is Li2X, so the charge on the X anion must be 2-

the ion is X2- elements in group 6A form monatomic ions with a 2- charge. In your list that is O or Po<
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