Question

Please help I don’t know this question )): thank you !!(:p

Answer 1

$\fbox{ \sf Correct \: answer \: is \: +1}$

The given data states that the 2-D diagram is representing Lithium molecule.

few things one must know before solving the question,

Lithium is a Alkali metal having 3 electrons, out of which two electrons lies in 1S orbital (K shell) & one electron lies in 2S orbital. To attain the stability ( nobel configuration) lithium requires 7 electron which is not possible at ordinary condition & it requires a huge amount of energy instead lithium loses one electron from outermost shell.

We know that when any atom loses a electron the oxidation number is written with plus(+) symbol.

Hence net charge on lithium ion is +1

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