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WorksheetsChapter 4 : Metallic Bonding
Total questions: 12
Worksheet time: 6mins
Electrons that are free to move in metals are called ..
delocalized electrons
oxidation number
chemical bond
salts
Why do metals conduct electricity and heat? Because ..
They are shiny
The electrons are held tightly within the lattice
The electrons are delocalised and able to move
The electrons are shared between two metal ions
Why does the melting point of metals increase across period 3, from Sodium (Na) to Aluminium (AI)?
Size of atoms gets smaller
Attraction force between nuclei and free electron increases
Increased space between the valence electrons in the "sea"
Increased number of valence electrons contributed to the "sea"
Why do metallic compounds conduct electricity as solids?
core electrons are mobile, allowing electricity to flow through the metal
valence electrons are mobile, allowing electricity to flow through the metal
protons are mobile, allowing electricity to flow through the metal
the metal cations are mobile, allowing electricity to flow through the metal
