Answer:
A lithium ion has a charge of  +1.
A calcium ion has a charge of  +2.
An aluminum ion has a charge of  +3.
A fluorine ion has a charge of  -1.
An oxygen ion has a charge of  -2.
Below, the correct charges of the elements are listed;
The ionic or electrical charge of an element is the new state the element acquires because of losing or gaining an electron.
When elements lose their electrons, they tend to attain a positive charge and when they gain an electron, they tend to acquire a negative charge. To easily identify the charge of the ions, the periodic table should be used.
Elements (metals) found on the left side of the periodic table tend to have a positive charge while elements (non-metals) on the right side of the table usually assume a negative charge.
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