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document Atoms
No video available VISIT THE PERIODIC TABLE&# 160;LIVE AT THE CHEMED DL! All matter is composed atoms.  Atoms are an ordered collection of various subatomic particles.  The central nucleus contains the protons and neutrons, around this are the all...
08 Jul, 2013 Comments: 0
document Electrons in Atomic Orbitals
CHECK OUT THE PERIODIC TABLE APPLET THAT SHOWS ATOMIC ORBITALS BEING FILLED Though we cannot predict exactly where an electron in an atom or molecule is located (Heisenberg uncertainty principle), we can predict where it is most likely to be.  Electrons of different energy can be described...
17 Jun, 2013 Comments: 0
document Electron Orbital Quantum Numbers
The properties of orbitals (energy, size, shape etc.) and the electrons within the orbitals (location, spin) are described using quantum numbers:   quantum number symbol value range describes principal n 1, 2, 3,...
17 Jun, 2013 Comments: 0
document Chemical Bonding
VISIT THE PERIODIC TABLE&# 160;LIVE AT THE CHEMED DL!  0; A molecule is a collection of atoms held together by bonds due to the interaction of the atomic electron orbitals.   One of the principle driving forces that makes bonding favorable is an atoms desire to...
17 Jun, 2013 Comments: 0
document Electronegativity
VISIT THE PERIODIC TABLE&# 160;LIVE AT THE CHEMED DL! CHEC K OUT A GRAPHICAL  ;ELECTRONEGATIVITY SCALE Electronegativity is defined as the ability of an atom to attract electrons towards itself. It is one of the most important properties for rationalizing...
17 Jun, 2013 Comments: 0
document Covalent Bond
VISIT THE PERIODIC TABLE&# 160;LIVE AT THE CHEMED DL!  0; Covalent bonds result when valence electrons are shared between atoms.  A covalent bond is a balance between the attractive and repulsive forces between atoms, which ends up placing electron density...
17 Jun, 2013 Comments: 0
document Ionic Bond
v\:* { behavior: url(#default#VML) } o\:* { behavior: url(#default#VML) } .shape { behavior: url(#default#VML) } VISIT THE PERIODIC TABLE&# 160;LIVE AT THE CHEMED DL!  0; Ionic bonds result when...
25 Jun, 2013 Comments: 0
document Hydrogen Bonding
Hydrogen bonding is the strongest of the intra- or intermolecular interactions we'll study.  It is weaker than an ionic or covalent bond, while being stronger than other non-bonding forces such as van der Waals or London dipersion forces.   It is actually an extreme form of dipole-dipole...
17 Jun, 2013 Comments: 0
document Drawing Lewis Structures
CHECK OUT THE PERIODIC TABLE LIVE! at the CHEMED DL One of the earliest and most important skills needed in organic chemistry is the ability to represent molecules in 2D (on paper).  To do this, you have to master the shared electron pair (covalent) Lewis bonding model.  Before...
17 Jun, 2013 Comments: 0
document Formal Charges
Video Content is currently unavailable VISIT THE PERIODIC TABLE&# 160;LIVE AT THE CHEMED DL! Knowing the formal charge on a particular atom in a structure is an important part of keeping track of the valence electrons (which typically are responsible for the bonds...
05 Jul, 2013 Comments: 0

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Department of Chemistry & Chemical Biology