Chapter 1-Structure and Bonding Flashcards
Organic chem
Study of carbon compounds
Why is carbon so important
-can share 4 valence electrons
-forms four strong covalent bonds
-can form a chain
Shape of s orbital
Sphere
Shape of p orbital
Dumbbell
Shape of d orbital
Clover leaf
Law of aufbau
Lowest energy filled first
Law of paul
One arrow up and one arrow down on each
Law of hunds
One arrow on each line before adding a second to the first one
Sp shape
180
Linear
Sp2 shape
120
Trigonal planar
Sp3 shape
Tetrahedral
Atomic number
= number of protons = number of electrons
Mass number
Total of protons and neutrons
Isotopes
Atoms with same atomic number but different mass numbers
Wave equation
Is the orbital and behavior of electrons and the space they like to be in
-ψ
Electron shells
Layers of electrons orbiting around the nucleus at different energy levels
Node
The space in between orbitals containing no electron density
Ground-state electron configuration
Lowest energy arrangements with s p d levels with arrows
Ionic bond
A bond between elements where an electrons is transferred
Covalent
Share electrons
Molecule
Neutral collection of atoms held together by covalent bonds
Lewis structure
Electron dot structures
-indicates covalent bonds
Kekule structures
Line-bind structure
-line instead of dot
Why can Sp3 orbitals form stronger bonds than unhybridized s or p orbitals
1 or 2 orbitals are larger and can overlap more effectively
Tetrahedral angle
109.5
Bond length and strength relationship
As bond length increases, bond strength weakens
Condensed structures
CH3CH2CH3
Skeletal structures
Carbons and their hydrogens are not drawn. Lines and bends
Molecular formula
Number of each atoms in a compound
Valence Bond theory
Electron sharing occurs when two orbitals overlap
Sigma bonds
Have a circular cross section and are formed by head on interaction
Pi bonds
Formed by sideways interaction of p orbitals
Sp3 carbons
Only forming single bonds with tetrahedral geometry
Sp2 carbons
Forming one double bond with planar geometry
Sp carbon
Forming a triple bond with linear geometry