3.1.1 Lattice Properties

Which of these statements are true about simple molecular lattices?

Tick ALL the correct statements.

• Methane is a gas at room temperature because the bonds between the atoms are weak.

• Ethane has a higher boiling point than methane because there are stronger London Forces between the molecules.

• Carbon dioxide has a higher boiling point than methane because its atoms are held together by double bonds rather than single bonds.

• Methane is a gas at room temperature because the intermolecular forces between the molecules are weak.

Which of these statements is true about giant covalent lattices?

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• Diamond has a high melting point because the atoms are all joined by covalent bonds in a lattice.

• Diamond has a high melting point because there are strong covalent bonds between its molecules.

• Diamond can conduct electricity as it has delocalised electrons.

• Diamond is insoluble

Which of these statements are true about giant metallic lattices?

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• Copper metal is held together by the attraction between the copper ions.

• Copper has a high melting point because there are strong forces of attraction between the copper ions and the free moving outer shell.electrons.

• Copper metal conducts electricity because the copper electrons are free to move.

• Copper has a high melting point because there are lots of intermolecular forces to break.

Which of these statements are true about giant metallic lattices?

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• Copper has a high melting point because there are lots of strong covalent bonds to break.

• Copper can be bent because the layers of copper ions can slide relative to each other

• The metal is held together by the electrostatic attraction between the copper ions and the delocalised electrons.

• Giant metallic lattices such as copper are soluble in water.

Which of these statements are true about giant ionic lattices?

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• Each molecule of sodium chloride contains one sodium ion and one chloride ion.

• Each sodium ion is attracted to one chloride ion.

• The ions exist in pairs containing one sodium ion and one chloride ion.

• The sodium ions and the chloride ions are not joined to each other, but are attracted to each other by electrostatic attraction.

Which of these statements are true about giant ionic lattices?

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• Each sodium ion is bonded ionically to one chloride ion, and then to others by attractive forces.

   

• There is a bond between the ions in each molecule, but no bonds between molecules.

• There are no molecules shown in the diagram.

• An ionic bond is when one atom donates an electron to another atom

Which of these statements are true about giant ionic lattices?

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• A sodium ion can only form one ionic bond because it only has one electron in its outer shell.

   

• Each sodium ion is attracted to all the chloride ions surrounding it

• Each ion is electrostatically attracted to all the nearby ions of opposite charge

• Ionic bonds are formed from electron transfer.

Which of these statements are true about giant ionic lattices in solution?

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• The ions are separated.

• The sodium chloride molecules beak apart when they dissolve.

• The sodium and chloride ions move around in Na⁺ Cl^– pairs.

• The solution conducts electricity because electrons can pass through the solution.