Metal Fundamentals Quiz

Strong ionic bonds between discrete ions producing insulating behavior

Delocalized electrons forming a metallic bond that enable high electrical conductivity

Molecular Van der Waals interactions producing low melting points

Covalent networks that always make them brittle and transparent

Rapid diffusion of vacancies creating immediate collapse

Dislocation motion within the crystalline lattice allowing plastic deformation

Weak hydrogen bonds between atoms enabling sliding

Ionic cleavage planes that separate entire layers under stress

It makes metals chemically inert in every environment

It converts metallic bonding into pure covalent bonding

It always reduces strength while increasing electrical conductivity

It tailors mechanical and chemical properties by introducing obstacles to dislocation motion or changing phase behavior

Heating a single pure aluminum rod in air causing a passive oxide layer

Bolting stainless steel to carbon steel in a wet electrolyte where the less noble metal corrodes

Applying paint to a metal surface to improve appearance

Submerging two pieces of identical copper in pure distilled water with no ions

Because heat treatment permanently makes metals superconducting

Because only steel can be melted

Because heating removes all impurities making any metal identical

Because steels form different microstructures (like martensite) through controlled cooling that change hardness, unlike many pure metals

Lower density choices (like aluminum) often require larger cross-sections or reinforcements compared to denser stronger metals

Using lighter metals eliminates the need for joints in structures

Lighter metals always cost less and need no finishing

Denser metals always improve corrosion resistance without coatings

Designing for inspection, load cycles, and including safety factors rather than assuming static conditions

Assuming loads will always be below yield and omitting inspections

Relying solely on aesthetic coatings to prevent mechanical failure

Designing only for the heaviest possible overload ignoring normal cycles

That stainless steel never corrodes under any condition

That thicker metal will always prevent corrosion; corrosion often attacks surface or crevices regardless of thickness

That painting always increases electrical conductivity of a metal

That removing oxygen entirely guarantees no corrosion in all cases