- Lightest metal – Li
- Lightest gas – H
- Metalloid – Ga , In , Ge , As , Sb.
- Liquid radioactive element – Francium
- Liquid non metal – Br2
- Solid non metal – B , C , Si , P , S , I .
- Non metal sublimate – I2
- Gaseous non metal – N , O , F , Inert gas monoatomic.
- Toxic metalloid – As
- Most reactive gaseous element – F
- Metal with maximum allotrope – Sn ( 10 )
- Smallest cation – H+
- Largest cation – Cs +
- Highest density – Os
Welcome To All Chemistry