CEM251 midterm

Electrostatic interaction between an anion and a cation, a metal and a non-metal; formed via electron transfer

• Ionic

• Covalent

Electron-sharing between two non-metals

• Ionic

• Covalent

A measure of an atom's attraction for electrons that it shares with another atom in a chemical bond

• Polar covalent bonds

• Ionic Bonds

• Electronegativity

The atoms sharing electrons have significantly different electronegativity

• Polar Covalent

• Non-Polar Covalent

• Ionic

The atoms sharing electrons have similar electronegativity

• Polar covalent

• Non-polar covalent

• Ionic

180 degree angle

• tetrahedral

• trigonal planar

• octahedral

• linear

120 degree angle

• linear

• tetrahedral

• trigonal planar

• trigonal pyramidal

4 bonds, 0 lone pairs, 109 degree angle

• linear

• trigonal planar

• tetrahedral

• trigonal pyramidal

4 bonds, 1 lone pair, <109 degree angle

• trigonal pyramidal

• trigonal planar

• linear

• octahedral

What are you allowed to do when drawing valid resonance structures?

• move electrons from pi bonds

• violate octet rule

• change overall charge

• break sigma bonds