2C Main Group Elements Flashcards
Most abundant elements in life
Oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus
Most abundant elements on earth
Oxygen, silicon, aluminum
Most abundant elements in universe
Hydrogen, helium, oxygen
Protium composition
Hydrogen with one e one p
Deuterium composition
Hydrogen with one e one p one n
Tritium composition
Hydrogen with one e one p two n
Use for alkali metals
Reducing reagents, drying reagents
What alkali metal can react with nitrogen?
Lithium because it’s the only one hard enough
Where are the triels
Boron group
Where are the tetrels
Carbon group
A state is metastable if
It exists without observable change even though it is thermodynamically unstable with respect to another state
A group of MOs where the energy different between are so small that it behaves as continuous
Band
Occurs when there is a significant energy difference between two bands
Band gap
Incident photons raise electrons from valence band to conduction band
Photovoltaic effect
A material behaves as a semiconductor without addition of a dopant
Intrinsic semiconductor
Semiconductor that requires a dopant
Extrinsic semiconductor
Dopant
An impurity introduced in minute amounts to enhance electrical conductivity
Holes introduced above the energy levels of the valence band
P type
Extra electrons introduced below the energy levels of the conduction band
N type
