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It depends how many electrons are on the outer shell :)

eg. one electron on the outer shell = loss one

seven electorns on outer shell = gain one

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Q: How do you know how many electrons are gained or lost in an atom?
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Related questions

An atom that has gained an electron is?

An atom that has gained an electron becomes a negatively charged ion.


An atom that has gained or lost electrons is referred to as what?

An ion


What is an atom that has gained or lost electrons callled?

An ion.


Number of electrons lost or gained by an atom in a chemical reaction is its?

Number of electrons are lost by an atom in a chemichl reaction


The atom that has gained or lost electrons is called an ion?

Yes. An atom that has gained one or more electrons is a negatively charged ion called an anion, and an atom that has lost one or more electrons is a positively charged ion called a cation.


What is an ion that has lost or gained electrons called?

An atom that has gained or lost electrons is called an ion. An atom that has gained one or more electrons becomes a negatively charged ion called an anion. An atom that has lost one or more electrons becomes a positively charged ion called a cation.


What are Atoms that carry an electrical charge called because they have gained or lost electrons?

Atoms that carry an electrical charge because they gained or lost electrons are called ions. An atom that has lost electrons will be positively charged, and it is called cation. On the other hand, an atom that has gained electrons will be negatively charged, and it is called anion.


What happens with the electrons when an atom froms a cation and an anion?

A cation is an atom that has lost one or more electrons. An anion is an atom that has gained one or more electrons.


What is an atom that has gained or lost electrons and is no longer neutral?

Valance electron


What is an atom that has gained or lost electrons and carries an electrical charge?

an ion


How many electrons are gained when going from Al to Al3 plus?

-3 electrons are gained,i.e,3 electrons are lost by Al and 3 electrons are gained by the other atom nearby.


What is the charge on a single atom that has not gained or lost electrons?

Such an atom would be neutral - no electric charge.