1) what is the same in the lithium atom and lithium ion?
2) what is different in the lithium atom and lithium ion?
3) explain why a lithium ion is positive in charge
4) what is the same in the oxygen atom and oxygen ion?
5) what is different in the oxygen atom and oxygen ion?
6) explain why a oxygen ion is negative in charge
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answer: mercury

explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

i wish i could but this one is weird give me abc and i can solve it.