Case Study
Group VIII elements are called Noble gases.
They are all non metals.
Noble gases occupy about 1.0% of the atmosphere as colourless gaseous mixture.
Argon is the most abundant with 0.9%.
They exists as monatomic molecules with very weak van-der-waals /intermolecular forces holding the molecules. they include;
|
Element |
Symbol |
Atomic number |
Electron structure |
State at room temperature |
|
Helium |
He |
2 |
2: |
Colourless gas |
|
Neon |
Ne |
10 |
2:8 |
Colourless gas |
|
Argon |
Ar |
18 |
2:8:8 |
Colourless gas |
|
Krypton |
Kr |
36 |
2:8:18:8 |
Colourless gas |
|
Xenon |
Xe |
54 |
2:8:18:18:8 |
Colourless gas |
|
Randon |
Rn |
86 |
2:8:18:32:18:8 |
Radioctive |
What is common in all the noble gases?