Answers

2014-10-04T16:18:13+08:00
Cal-calcium
H-hydrogen
CO2-carbon dioxide
O2-oxygen
H2O-water
0
2014-10-04T16:31:21+08:00
The properties of elements are as follows: 
Ionization energy
Electronegativity
Electron Affinity
Metallic Property
Atomic Number
Atomic Size
Thermal Conductivity :-) 
0
Well actually there are 7 properties... I've stated it all :-)