S2atomicstructure

S2atomicstructure - 1) 2) 3) 4) 5) Chapter2: distance...

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Chapter2: 1) distance between two atoms is 3A, 1nm=10A 2) nucleus has neutrons and protons= mass number 3) Atomic number Z= # of protons in nucleus 4) Atomic mass is expressed in amu 5) Electrons: different states, energy levels a) Valence electrons participate in bonding, and affect properties b) Me=9.1*10^-28g c) Q=1.6*10^-19C d) Diameter electron=5*10^-15m e) N, l, ml, ms (a) N: energy level (b) L is where electrons are around nucleus (c) # of electrons/shell or space (d) Spin up or down f) 1 is s and 2 electrons g) 2 is s&p and have 2 and 6 h) 3 is d, p,s and have 10,6,2 i) Pauli’s exclusion principle: no 2 electrons can have same quantum numbers j) Periodic table i) Rows are energyshells, columns are same # of valence e-, similar prop. ii) Electro+ are metals and negative are nonmetals iii) Electronegativity increases from left to right and down to up iv) Atomic radii increases from up to down and decreases from L to R k) Ionic bonds: transfer of electrons l) Covalent bonding: sharing electrons
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This note was uploaded on 09/25/2010 for the course MATE 210 taught by Professor Gary during the Spring '10 term at Aarhus Universitet.

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S2atomicstructure - 1) 2) 3) 4) 5) Chapter2: distance...

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