Exploring the World of Metals

What are three common properties of metals?

• Poor conductors of heat and electricity

• Brittle and easily breakable

• Non-malleable and non-ductile

• Good conductors of heat and electricity, malleable, ductile

Name two types of metals based on their conductivity.

• Iron, Steel

• Gold, Silver

• Copper, Aluminum

• Lead, Zinc

List three uses of metals in everyday life.

• 1. Construction materials (steel, aluminum) 2. Kitchen utensils (pots, pans) 3. Electrical wiring (copper)

• Furniture (wood, glass)

• Clothing materials (cotton, wool)

• Food packaging (plastic, paper)

What is the reactivity series of metals?

• Iron, Nickel, Cobalt, Silver, Gold

• Potassium, Sodium, Calcium, Magnesium, Aluminum, Carbon, Zinc, Iron, Tin, Lead, Copper, Silver, Gold

• Lithium, Barium, Strontium, Calcium, Magnesium

• Bismuth, Mercury, Lead, Tin, Copper

How do metals typically react with acids?

• Metals do not react with acids at all.

• Metals react with acids to produce hydrogen gas and a salt.

• Metals react with acids to produce oxygen gas and water.

• Metals dissolve in acids without any reaction.

What is an alloy? Give an example.

• Bronze, which is a type of pure iron.

• Aluminum, which is a non-metallic element.

• Copper, which is a pure metal.

• Steel, which is an alloy of iron and carbon.

What property makes metals good conductors of electricity?

• High density of atoms

• The presence of free electrons

• Low melting point

• Brittle structure

Name a metal that is less reactive than hydrogen.

• Calcium

• Copper

• Potassium

• Sodium

What is the main use of aluminum in construction?

• Paving stones for walkways and driveways

• Insulation material for thermal resistance

• The main use of aluminum in construction is for structural components and cladding due to its lightweight and corrosion resistance.

• Electrical wiring due to its high conductivity

How do alloys differ from pure metals?

• Alloys have lower melting points than pure metals.

• Pure metals are always stronger than alloys.

• Alloys differ from pure metals in that they are mixtures of multiple elements, enhancing properties like strength and resistance.

• Alloys are made of a single element only.