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Science 10
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Forming Compound -The gasses in group is are very unlidey to read to anything, no chemical reactions. -Their outter most valence shell is completley filled with electrons. -Valance shell electrons are what we use to predict how an atom will interact. -An atom may quive a valence shell like that of its closests roble gas. @An atom may give up an atom (becomes ionisation) AAn atom may gain electrons (anion) BAn atom may share electrons. -Two atoms that may share are pair of electrons two pairs, or three pairs, these bonds are called double, sing first and triple respectiley. -Two types of bonds can occur: Ionic: when two ions of different charge are attracted to another and covalent- when atoms share electrons. -A neutral particle that is composed of atoms joined together bg cevalent boncls is called a molecule. -Substances composed of molecules are called molecular compounds.
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