Materials and Construction
Metalloid is

Highly electronegative in nature
An alloy
An element which exhibits the properties of both metal & non-metal
All of these

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Materials and Construction
Lead is

Not resistant to corrosion
Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings
Used as a cathodic material
Not used as pigment (in its compound forms) for paints

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