5B
Boron
붕소 · ホウ素
Metalloid
Atomic number5
ElementB — Boron
Atomic mass10.81
CategoryMetalloid
Group13
Period2
Electron config[He] 2s2 2p1
Shells2,3
State (RT)Solid
Melting pt2076°C
Boiling pt3927°C
Electronegativity2.04
Discovered1808
Main usesGlass, semiconductors, detergents
2 · 3