Here are the properties of six unknown elements:
Element 1
State of matter: gas
Conductivity: very poor
Solubility (H₂O): none
Melting point: -157°C
Element 2
State of matter: solid
Conductivity: good
Solubility (H₂O): reacts rapidly
Melting point: 777°C
Element 3
State of matter: solid
Conductivity: poor
Solubility (H₂O): none
Melting point: 327°C
Element 4
State of matter: liquid
Conductivity: very poor
Solubility (H₂O): negligible
Melting point: -7°C
Element 5
State of matter: solid
Conductivity: excellent
Solubility (H2O): none
Melting point: 1085°C
Element 6
State of matter: solid
Conductivity: good
Solubility (H2O): reacts violently
Melting point: 29°C
After studying the properties of these unknown elements, consider the following question:
Which element is most likely to be a metalloid?