872208
Descrição
Mapa Mental por Evangeline Taylor, atualizado more than 1 year ago
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Criado por Evangeline Taylor
mais de 10 anos atrás
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Metallic Structures
- Metal properties are all due to
the sea of free electrons
- Metal also consist of a
giant structure
- Metal also consist of a
giant structure
- Metallic bonds involve the
all-important ‘free electrons’
- Produce all the
properties of metals
- These delocalised (free) electrons
come from the outer shell of every
metal atom in the structure
- Produce all the
properties of metals
- These electrons are free to move through
the whole structure and so metals are good
conductors of heat and electricity
- These electrons also hold the atoms
together in a regular substance
- Strong force of electrostatic attraction between the
positive metal ions and the negative electrons.
- Strong force of electrostatic attraction between the
positive metal ions and the negative electrons.
- They also allow the layers of
atoms to slide over each other,
allowing metals to be bent and
shaped.
- Alloys are harder than pure
metals
- Pure metals often aren’t
quite right for the job
- Pure metals often aren’t
quite right for the job
- So scientists mix of two or more metals
together – creating an alloy with the properties
they want.
- Different element
has different sized
atoms
- So when another metal is
mixed with a pure metal
- The new metal atoms will distort the
layers of metal atoms
- The new metal atoms will distort the
layers of metal atoms
- So when another metal is
mixed with a pure metal
Anexos de mídia
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