Metalloids

5

B

10.812 u

[He] 2s2 2p1

Boron

Metalloids

14

Si

28.0854 u

[Ne] 3s2 3p2

Silicon

Metalloids

32

Ge

72.63 u

[Ar] 3d10 4s2 4p2

Germanium

Metalloids

33

As

74.9216 u

[Ar] 3d10 4s2 4p3

Arsenic

Metalloids

51

Sb

121.76 u

[Kr] 4d10 5s2 5p3

Antimony

Metalloids

52

Te

127.6 u

[Kr] 4d10 5s2 5p4

Tellurium

Metalloids

85

At

210 u

[Xe] 4f14 5d10 6s2 6p5

astatine

Metalloids