Structure and properties of metals Flashcards
What are the structural properties of metals?
Metals are widely used because of their properties: strength, ductility, high melting point, thermal and electrical conductivity, and toughness.
What does metal structure mean?
Metals consist of giant structures of atoms arranged in a regular pattern. The electrons from the outer shells of the metal atoms are delocalised , and are free to move through the whole structure. This sharing of delocalised electrons results in strong metallic bonding .
How many metals are there?
There are about 70 metals out of 92 natural elements in the periodic table.
Why are metals so ductile?
This is because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond.
How do metals bond?
Metallic bonds result from the electrostatic attraction between metal cations and delocalized electrons.
Are metals shiny?
Metals appear shiny because they contain vacant electrons.
What is the atomic structure of metals?
In metals, and in many other solids, the atoms are arranged in regular arrays called crystals. A crystal structure consists of atoms arranged in a pattern that repeats periodically in a three-dimensional geometric lattice.
What is special about the atomic structure of metals?
The electrons from the outer shells of the metal atoms are delocalised , and are free to move through the whole structure.
How are the atoms structured in metals
The atoms in a metal are arranged in a regular pattern and are closely packed together.
why are metals good conductors of heat
because at least one electron per atom is free
What is the MP and BP of metals
High
Why are the MP and BP of metals so high
Due to the strong attraction force between the positive metal ions and the sea of electrons
Why do metals conduct electricity
Due to the mobile electrons within the metallic structure
Why are metals malleable
The rows of ions can slide over one another repositioning themselves back into strong bonds
