Question

All transmission elements are called
1 metals 2 non metals
3 radio active 4 metalloids

Answer 1

Elements recognized as metalloids

v

t

e

 13141516172B

BoronC

CarbonN

NitrogenO

OxygenF

Fluorine3Al

AluminiumSi

SiliconP

PhosphorusS

SulfurCl

Chlorine4Ga

GalliumGe

GermaniumAs

ArsenicSe

SeleniumBr

Bromine5In

IndiumSn

TinSb

AntimonyTe

TelluriumI

Iodine6Tl

ThalliumPb

LeadBi

BismuthPo

PoloniumAt

Astatine 

  Commonly recognized (86–99%): B, Si, Ge, As, Sb, Te

  Irregularly recognized (40–48%): Po, At

  Less commonly recognized (24%): Se

  Rarely recognized (8–10%): C, Al

  (All other elements cited in less than 6% of sources)

  Arbitrary metal-nonmetal dividing line: between Be and B, Al and Si, Ge and As, Sb and Te, Po and At

Recognition status, as metalloids, of some elements in the p-block of the periodic table. Percentages are median appearance frequencies in the lists of metalloids.[n 1] The staircase-shaped line is a typical example of the arbitrary metal–nonmetal dividing line found on some periodic tables.