METALLIC BOND

What is the basis of a metallic bond?

• the attraction of neutral metal atoms.

• the attraction between protons and neutrons.

• the attraction between positive metal ions and interlocking electrons.

• the attraction between positive metal ions and free moving electrons.

At room temperature, most metals are

• liquid
• solid
• gas
• an alloy

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"

Electrons that are free to move in metals are called _________ electrons

Why do metals conduct electricity?

• They are shiny

• The electrons are delocalised and able to move

• The electrons are held tightly within the lattice

• The electrons are shared between two metal ions

Why are metals malleable?

• They are shiny

• The electrons are held tightly within the lattice structure making it strong

• The electrons are delocalized and able to move between the atoms

• The electrons are shared between two metal ions and this holds the atoms together

Which of these are considered properties of metals? (choose ALL that apply)

• brittleness

• low melting point

• luster (shininess)

• malleability

• ductility

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

I can hit a metal with a hammer without the metal shattering because of its __________.

• Ductility
• Malleability
• Conductivity
• Lustrousness

Why do metals have high melting points?

• They don't
• The negatively charged electrons act as a glue to hold the positively charged ions together.
• All the electrons become delocalised