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Atomic Bonding Mr. Skirbst Physical Science Topic 15
Bonding * Atoms (of elements) combine to form new substances * Determined by atomic structure (electrons)
Electron Cloud * Area outside (+) nucleus where (-) electrons are found
Electron Cloud * Area outside (+) nucleus where (-) electrons are found * Electrons found in various energy levels
Electron Cloud * Neutral atoms have balanced # of protons (+) & electrons (-)
Energy Levels *each level has a maximum # of electrons that can fit
Energy Levels *each level has a maximum # of electrons that can fit * Levels are filled from the lower (inside) to higher (outer) energy level
Energy Levels 1 st level = 2 electrons maximum 2 nd level = 8 electrons maximum 3 rd level = 8 electrons maximum
Valence Electrons Number of electrons in the outermost energy level
Valence Electrons Number of electrons in the outermost energy level * Stability achieved when outer energy level is filled (complete)
Valence Electrons Number of electrons in the outermost energy level * Stability achieved when outer energy level is filled (complete) * Valence # determines possibility and type of bond
3 Types of Atomic Bonds 1.Ionic Bond
3 Types of Atomic Bonds 1.Ionic Bond * involves transfer of valence electron
3 Types of Atomic Bonds 1.Ionic Bond * involves transfer of valence electron * atoms form ions (of opposite charges) ** opposites attract!**
Ionic Bond example
3 Types of Atomic Bonds 2.Covalent Bond
3 Types of Atomic Bonds 2.Covalent Bond * involves sharing valence electrons
Covalent Bond example
3 Types of Atomic Bonds 3.Metallic Bond
3 Types of Atomic Bonds 3.Metallic Bond * involves a “sea of electrons”
3 Types of Atomic Bonds 3.Metallic Bond * involves a “sea of electrons” * valence electrons free to “swim” from one atom to another
3 Types of Atomic Bonds 3.Metallic Bond * metals are good conductors of heat and electricity
Metallic Bond Example
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