Metals are most likely to form ions by losing electrons. Here's why:

* Metallic nature: Metals have relatively few electrons in their outer shell (valence electrons).

* Electropositivity: Metals tend to have low ionization energies, meaning it doesn't require much energy to remove an electron from their outer shell.

* Tendency to form cations: By losing electrons, metals achieve a stable electron configuration, often resembling a noble gas. The resulting positively charged ion is called a cation.

Example: Sodium (Na) has one valence electron. It readily loses this electron to form a sodium cation (Na+), which has the same electron configuration as the noble gas neon (Ne).

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