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Structure and bonding
Descripción
GCSE Chemistry 2 Mapa Mental sobre Structure and bonding, creado por toby_brown el 07/10/2013.
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chemistry 2
chemistry 2
gcse
Mapa Mental por
toby_brown
, actualizado hace más de 1 año
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Creado por
toby_brown
hace casi 11 años
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Resumen del Recurso
Structure and bonding
Compounds are substances in which atoms of two or more elements are chemically bonded
Bonding
Ionic
Atoms gain or lose electrons and become ions
Atoms that lose electrons become positively charged
Atoms that gain electrons become negatively charged
Ions have a structure of a noble gas (complete outer shell)
Covalent
Atoms share electrons in their outer shells.
When atoms share pairs of electrons. These bonds between atoms are strong.
Simple covalently bonded substances are H2, Cl2, O2, HCl, H2O, NH3 and CH4
Others have giant covalent structures (macromolecules), such as diamond and silicon dioxide
Elements
Group 1
Alkali Metals
All react with non-metals to form ionic compounds in which the metal has one positive charge
Group 7
Halogens
All react with alkali metals to form ionic compounds where the halide ions have a single negative charge
Ionic compounds are held together by strong electrostatic forces of attraction between oppositely charged ions.
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