What defines boron and its kin?

The boron group is the3nd column in the periodic table, which means these elements have three electrons on their valence shell they wish to lose. They grow more metallic with increasing atomic number.

• metals
  • except for the metalloid B, boron (boori)​
• soft
  • except for the hard B, boron (boori)​
• used in various utility materials
  • heat resistant Borosilicate​ glass
  • Al, aluminum foil​ that protects food from oxidation