Question

which element can formed atom to ion mean loses or gain electron​

Answer 1

Answer:

Metals (left side of periodic table) will lose electrons and form positive ions when they react, and nonmetals (right side of periodic table) will gain electrons and form negative ions when they react. An ion is represented by adding a positive or negative sign in superscript to the chemical symbol for the atom.

Explanation:

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Answer 2

Answer:

Metals (left side of periodic table) will lose electrons and form positive ions when they react, and nonmetals (right side of periodic table) will gain electrons and form negative ions when they react.