Intro to Metallic Bonding

Metals have positive ions in a ‘sea of electrons’. Which metal atom provides the most electrons for the sea?

• Aluminium

• Sodium

• Calcium

• Magnesium

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NGSS.HS-PS1-1

Which statement describes the structure of copper?

• It has a lattice of negative ions in a ‘sea of electrons’.

• It has a lattice of negative ions in a ‘sea of protons’.

• It has a lattice of positive ions in a ‘sea of electrons’.

• It has a lattice of positive ions in a ‘sea of protons’

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NGSS.HS-PS1-3

The structure of copper is described as a lattice of positive ions in a ‘sea of electrons’.

Which statements are correct?

• Copper has a high melting point because of the strong electrostatic attraction between the positive ions and the ‘sea of electrons’.

• Copper is malleable because the layers of atoms in the lattice can slide over each other.

• Copper atoms can be oxidised to form copper ions by losing electrons.

Copper is a metallic element.

Which statements about copper are correct?

• Copper is malleable because layers of ions are in fixed positions and cannot move.

• The structure of copper consists of negative ions in a lattice.

• Copper conducts electricity because electrons can move through the metal.

• Electrons hold copper ions together in a lattice by electrostatic attraction.

Tags

NGSS.HS-PS1-3

Which statement describes the lattice structure of a metal?

• The lattice consists of alternating positive ions and negative ions.

• The lattice consists of neutral atoms arranged in layers.

• The lattice consists of positive ions in a ‘sea of electrons’.

• The lattice consists of neutral atoms in a ‘sea of electrons’.

Which statement about metals is correct?

• Layers of positive ions can slide over each other making metals malleable.

• Metallic bonding consists of a lattice of negative ions in a sea of delocalised electrons.

• Metallic bonding consists of a lattice of positive ions in a sea of delocalised negative ions.

• Metals conduct electricity because positive ions are free to move.

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NGSS.HS-PS3-5

Which statement describes metallic bonding?

• The attraction between a lattice of negative ions and delocalised protons.

• The attraction between a lattice of positive ions and delocalised electrons.

• The attraction between delocalised protons and electrons.

• The attraction between oppositely charged ions.

Which statement about metals is not correct?

• Metals are malleable because the metal ions can slide over one another.

• Metals conduct electricity because electrons can move through the lattice.

• Metals consist of a giant lattice of metal ions in a ‘sea of electrons’.

• Metals have high melting points because of the strong attraction between the metal ions.

The diagram shows metallic bonding.

Which labels are correct?

• X: atomic nucleus

  Y: outer electron

• X: metal atom

  Y: mobile electron

• X: metal cation

  Y: mobile electron

• X: positive ion

  Y: negative ion

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-6

The diagram represents the general structure of a solid Z.

What is Z?

• aluminium

• iodine

• silicon dioxide

• sulfur

Tags

NGSS.HS-PS1-3