![]() For example, magnesium atoms form Mg 2 + ions. Group 2 atoms lose two electrons to form positively charged ions. ![]() ![]() For example, potassium atoms do this to form ions with the same electron configuration as the noble gas argon. Metals that are located in column 1A of the periodic table form ions by losing one electron.Īccordingly, which groups gain and lose electrons?Īll Group 1 atoms can lose one electron to form positively charged ions. Elements that are nonmetals tend to gain electrons and become negatively charged ions called anions. Elements that are metals tend to lose electrons and become positively charged ions called cations.
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