An Ion is an atom or group of atoms with a charge.
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Why can atoms gain or lose electrons?
They have incomplete outer shells
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How can atoms become ionic?
If they lose or gain electrons by any means.
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What is a cation?
An element with a positive charge
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Do metals gain or lose electrons?
Metals lose electrons, making them cations. The number of electrons they lose is the number of electrons on their outer shell.
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What is an anion?
An anion is a negatively charged ion.
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Do non-metals gain or lose electrons?
Non-metals gain electrons to form anions. When non-metals become anions the end of their name changes to -ide. Non-metals gain enough electrons to complete their outer shell, so group seven gains electrons from group 1.
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What happens when atoms transfer electrons to each other?
When electrons are transferred from a metal to a non-metal, the charges become opposite, attracting the elements together, forming an ionic bond.
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