In general, the metal elements (those to the left of the Periodic Table) will form cations. This is because the atoms of those elements have less than half of the necessary electrons to fill their outermost or valence electron shell. In contrast, the non-metal elements (those to the right of the periodic table) will tend to form anions because they have more than half of the necessary electrons to fill their valence electron shell.
A group of atoms attack an electron,
Helium does not form cation
Cations form when atoms lose electrons, they gain a positive charge as a result.
In most reactions, Ag atoms loses an electron apiece to form the silver cation. This cation has a plus one charge. It is represented as Ag+.
Iron is a metal, and is made of iron atoms. When it reacts to form a compound the iron atoms will lose electrons and become cations, either Fe2+ or Fe3+. All metals form cations when they form ionic compounds.
Lithium form the cation Li2+.
Rubidium will form cation: Rb+
Helium does not form cation
Cations form when atoms lose electrons, they gain a positive charge as a result.
Tin itself is a neutral element and therefore neither a cation nor an anion. A single tin atom can form a cation by donating two or four of its electrons to more electronegative atoms. A single tin atom is not electronegative enough to form an anion, but together with oxygen atoms, a tin atom can form a polyatomic anion.
In most reactions, Ag atoms loses an electron apiece to form the silver cation. This cation has a plus one charge. It is represented as Ag+.
anion and cation
Iron is a metal, and is made of iron atoms. When it reacts to form a compound the iron atoms will lose electrons and become cations, either Fe2+ or Fe3+. All metals form cations when they form ionic compounds.
In an ionic bond to other atoms: Ca+2 , a positive ion (cation).And negative ions (anions) of the the combined atom or group of atoms.
Lithium form the cation Li2+.
Cs+ cation
Ag+ cation
Anion and cation:)