2.3 Flashcards
1
Q
Ionization energy / potential
A
- energy required to remove electrons from a gaseous species
- subsequent always higher than initial
- energy required to remove noble gas state is exceptionally high
- significant change in IE indicate stable state
- noble gases and G1 cations have high IE because both have noble gas configuration
- G1 and G2 (active metals) have such low IE that exist naturally as cations
2
Q
Electron affinity
A
-energy released (reported as positive though DeltaG is -: favorable) via heat on gaining electron by atom in gaseous state
3
Q
Electronegativity
A
- measured on the Pauling electronegativity scale
- .7 for Cesium, 4.0 for Fluorine
4
Q
General trends
A
- Z_eff, IE, electron affinity (latter 2 pertain only to gaseous species), electronegativity (inequality in covalent bond) increase toward top right
- atomic radius increases toward bottom left
