What type of structure do metals have?
A giant structure held together by metallic bonding.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Foundation · 5.2.2.7
Revise AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Foundation specification point 5.2.2.7, Properties of metals and alloys, with free active-recall flashcards. Flip through the set or review every question and answer below.
1 / 8
What type of structure do metals have?
A giant structure held together by metallic bonding.
What is metallic bonding?
The strong electrostatic attraction between positive metal ions and delocalised electrons.
Why do most metals have high melting and boiling points?
Strong metallic bonds act throughout the giant lattice, so a large amount of energy is needed to overcome them and separate the particles.
Why are pure metals often too soft for many uses?
Their regular layers of atoms can slide over each other easily.
What is an alloy?
A mixture of a metal with one or more other elements, often other metals.
Why are alloys harder than pure metals?
Different-sized atoms disrupt the regular layers, making them harder to slide past each other.
When are alloys often more useful than pure metals?
When strength or resistance to bending is needed.
Why can a pure metal be bent or shaped rather than shattering when a force is applied?
Its regularly arranged layers of atoms can slide past one another without the metallic bonding being completely broken.