| 1 |
Lowest Electronegativity
|
Cs |
| 2 |
Highest Electronegativity
|
F |
| 3 |
Highest ionisation potential
|
He |
| 4 |
Lowest ionisation potential
|
Cs |
| 5 |
Lowest electron affinity
|
Noble Gas (zero) |
| 6 |
Highest electron affinity
|
Chlorine |
| 7 |
Metal with lowest melting point
|
Hg (Mercury) -38.9 C |
| 8 |
Metal with highest melting point
|
W (Tungsten) 3410 C |
| 9 |
Most reactive solid element
|
Li |
| 10 |
Most reactive gaseous element
|
F |
| 11 |
Group containing maximum number of gaseous elements
|
Zero group |
| 12 |
Total number of gaseous elements in periodic table
|
11 |
| 13 |
Total number of liquid elements in periodic table
|
4 (Ga, Br, Cs, Hg)
Fr and Eka are also liquid
|
| 14 |
Total number of solid elements in periodic table
|
89 |
| 15 |
Total number of radioactive elements in periodic table
|
25 |
| 16 |
Non-metal with highest melting point
|
Diamond |
| 17 |
Element having maxumum tendency for catenation
|
Carbon |
| 18 |
Metals showing highest oxidation number
|
Ru, Os |
| 19 |
Most stable carbonate
|
Cs2CO3 |
| 20 |
Strongest alkali
|
Cs(OH) |
| 21 |
Strongest basic oxide
|
Cs2O |
| 22 |
Best electricity conductor
|
Ag |
| 23 |
Best electricity conductor among non-metals
|
Graphite |
| 24 |
Liquid Non-metal
|
Br |
| 25 |
Lighest solid metal
|
Li |
