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Multiple Choice

The lithium ion symbol in lithium chloride is which of the following?

Lithium in LiCl exists as Li+, formed when lithium loses one electron to balance the chloride’s negative charge. If we write the isotope symbol with atomic number and mass number, lithium has atomic number 3. The common lithium isotope has mass number 7, so the ion symbol is 3 7 Li+—the plus sign shows the positive charge of the ion. This matches the given correct option. The other options would either show a different mass number or a negative/uncharged form, which doesn’t describe the lithium ion in LiCl.

Lithium in LiCl exists as Li+, formed when lithium loses one electron to balance the chloride’s negative charge. If we write the isotope symbol with atomic number and mass number, lithium has atomic number 3. The common lithium isotope has mass number 7, so the ion symbol is 3 7 Li+—the plus sign shows the positive charge of the ion. This matches the given correct option. The other options would either show a different mass number or a negative/uncharged form, which doesn’t describe the lithium ion in LiCl.