ENTC 206 Notes 4 Atomic Bonding

ENTC 206 Notes 4 Atomic Bonding - ENTC 206 Atomic Bonding...

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ENTC 206 Atomic Bonding Chapter 2
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Neutron Electron Proton Nucleus valence electrons (6) Valence shell : Outermost orbital (2s 2 2p 4 ) Oxygen atom,O 8 ( 1s 2 2s 2 2p 4 ) Carbon atom,C 6 ( 1s 2 2s 2 2p 2 ) or ( 1s 2 2s 1 2p 3 ) Atomic Structure C 6 O 8
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Electronic Structure of the Atom Quantum numbers – Describe the energy level of electrons Valence of an atom – Relates to the ability of the atom to enter into chemical combination with other elements – Determined by the number of electrons in the outermost combined level Electronegativity is a measure of the power of an atom to attract electrons towards itself
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(ml) specifies the number of energy levels (states) for each sub-shell (s,p,d,f) Primary quantum number (n) specifies the number of shells Azimuthal quantum number ( l ) specifies the energy levels (sub- shell) in each shell ( l =0(s), l =1(p), l =2(d), l =3(f)) Pauli Exclusion Principle specifies that no more than 2 electrons can be located in an energy level; this gives the 4th quantum number called spin quantum number m s with values of +1/2 and -1/2. Energy Level of Electrons
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ENTC 206 Notes 4 Atomic Bonding - ENTC 206 Atomic Bonding...

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