Question

question 2 (2 points)
indicate the type of solid in each example
lattice points type of crystal answer true or false for each
sodium phosphate ions ionic 1
ammonia, nh₃ ions molecular 2
helium atoms atomic 3
iron atoms atomic 4
diamond bonded atoms molecular 5
a. true b. false
considering the two basic types of solids, while sodium phosphate is a 6 solid, glass is an 7 solid.
c. amorphous d. crystalline

Explanation:

• Sodium phosphate (\(Na_3PO_4\)): It is composed of \(Na^+\) and \(PO_4^{3 -}\) ions. Ionic solids have ions as lattice points. So, the statement "sodium phosphate with ions as lattice points is ionic" is True.
• Ammonia (\(NH_3\)): \(NH_3\) is a covalent - molecular compound. Molecular solids have molecules (not ions) as lattice points. So, the statement "ammonia with ions as lattice points is molecular" is False.
• Helium (\(He\)): Helium is a noble gas. Atomic solids (non - bonded atoms) have atoms as lattice points. So, the statement "helium with atoms as lattice points is atomic" is True.
• Iron (\(Fe\)): Iron is a metal. Metals are considered as atomic solids (metallic bonding, but in the context of basic solid types with atoms as lattice points for atomic solids in some basic classifications). So, the statement "iron with atoms as lattice points is atomic" is True.
• Diamond (\(C\)): Diamond has a covalent network structure. Molecular solids have discrete molecules. So, the statement "diamond with bonded atoms as lattice points is molecular" is False.
• Sodium phosphate: It has a well - ordered internal structure, so it is a crystalline solid.
• Glass: It has a disordered internal structure, so it is an amorphous solid.

Answer:

1. A. true
2. B. false
3. A. true
4. A. true
5. B. false
6. D. crystalline
7. C. amorphous