Question

question 9 (1 point)
give the type of crystal and the type of lattice points for the following substance
lattice points type of crystal
acetone 1 2
gold 3 4
gold (iii) nitrate 5 6
diamond 7 8
a. molecules b. molecular c. ions d. ionic
e. atoms f. atomic

Explanation:

• Acetone (\(CH_3COCH_3\)) is a covalent compound. In molecular crystals, the lattice points are occupied by molecules. So for acetone, lattice points are molecules (A) and type of crystal is molecular (B).
• Gold (\(Au\)) is a metal. In metallic crystals (a type of atomic - like crystal in terms of lattice - point occupancy as atoms are the basic units in the metallic lattice), the lattice points are occupied by atoms (E). Gold has a metallic crystal structure (can be considered as a form of atomic - related crystal in terms of lattice - point nature).
• Gold(III) nitrate (\(Au(NO_3)_3\)) is an ionic compound. Ionic compounds form ionic crystals where the lattice points are occupied by ions (C) and the crystal type is ionic (D).
• Diamond (\(C\)) is a covalent - network solid. In atomic crystals (covalent - network solids are a type of atomic crystals in terms of lattice - point occupancy as atoms are covalently bonded throughout the crystal), the lattice points are occupied by atoms (E) and the crystal type is atomic (F).

Answer:

1. A. molecules
2. B. molecular
3. E. atoms
4. (metallic, but closest in the given options is F. atomic as metallic crystals have atoms as lattice - points in a sense similar to atomic crystals in terms of basic unit occupancy)
5. C. ions
6. D. ionic
7. E. atoms
8. F. atomic