Question

1. match the elements in the list below with one of the following two descriptions: (i) shiny, ductile, conductor of electricity (ii) dull, brittle insulator (a) p _ (b) w _ (c) cu _ (d) f _ (e) hg _ (f) k _

Explanation:

Step1: Analyze properties of each element

• Phosphorus (\(P\)): Non - metal. Non - metals are dull, brittle and insulators.
• Tungsten (\(W\)): Metal. Metals are shiny, ductile and conductors of electricity.
• Copper (\(Cu\)): Metal. Metals are shiny, ductile and conductors of electricity.
• Fluorine (\(F\)): Non - metal. Non - metals are dull, brittle and insulators.
• Mercury (\(Hg\)): Metal. Metals are shiny, ductile (in the liquid state, it can be thought of in terms of its ability to conduct electricity as a liquid metal) and conductors of electricity.
• Potassium (\(K\)): Metal. Metals are shiny, ductile (when in a malleable state, for example, when freshly cut and in a non - oxidized state) and conductors of electricity.

Answer:

(a) \(P\): (ii) dull, brittle insulator
(b) \(W\): (i) shiny, ductile, conductor of electricity
(c) \(Cu\): (i) shiny, ductile, conductor of electricity
(d) \(F\): (ii) dull, brittle insulator
(e) \(Hg\): (i) shiny, ductile, conductor of electricity
(f) \(K\): (i) shiny, ductile, conductor of electricity