an atom is called an ion when it has more and uneven amount of protons and electrons
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An atom with a charge (either positive or negative) is called an "ion." An ion with a positive charge is called a "cation" and an ion with a negative charge is called an "anion ."
They call it "leaf-fall".
A negative ion is called an anion, while a positive ion is called a cation.
it is called a cation and a negitively charged ion is an anion
Water disassociates to form the OH- ion or the hydroxide ion, and the H3O+ ion, otherwise known as the hydronium ion.
An atom is called an ion if there is a charge on it - positive or negative.
When an atom gets charged it is called ion.
It is called a Nitride Ion