The substance that has a regular lattice of positive metal ions in a sea of delocalised electrons is Na(s).

Here's why:

1. Na(s) or Sodium in its solid state is a metal. Metals have a unique structure where the positive metal ions are arranged in a regular lattice and are surrounded by a sea of delocalised electrons. This structure allows metals to conduct electricity and heat.

2. NaCl(s) or Sodium Chloride is an ionic compound. In an ionic compound, the ions are not free to move around, so it does not have a sea of delocalised electrons.

3. SiO2(s) or Silicon Dioxide is a covalent compound. In a covalent compound, electrons are shared between atoms, not delocalised.

4. O2(g) or Oxygen in its gaseous state is a covalent molecule. It also does not have a sea of delocalised electrons.

Question

The substance that has a regular lattice of positive metal ions in a sea of delocalised electrons is Na(s).

Here's why:

1. Na(s) or Sodium in its solid state is a metal. Metals have a unique structure where the positive metal ions are arranged in a regular lattice and are surrounded by a sea of delocalised electrons. This structure allows metals to conduct electricity and heat.

2. NaCl(s) or Sodium Chloride is an ionic compound. In an ionic compound, the ions are not free to move around, so it does not have a sea of delocalised electrons.

3. SiO2(s) or Silicon Dioxide is a covalent compound. In a covalent compound, electrons are shared between atoms, not delocalised.

4. O2(g) or Oxygen in its gaseous state is a covalent molecule. It also does not have a sea of delocalised electrons.

Knowee AI · Accepted Answer

The substance that has a regular lattice of positive metal ions in a sea of delocalised electrons is Na(s).

Here's why:

1. Na(s) or Sodium in its solid state is a metal. Metals have a unique structure where the positive metal ions are arranged in a regular lattice and are surrounded by a sea of delocalised electrons. This structure allows metals to conduct electricity and heat.

2. NaCl(s) or Sodium Chloride is an ionic compound. In an ionic compound, the ions are not free to move around, so it does not have a sea of delocalised electrons.

3. SiO2(s) or Silicon Dioxide is a covalent compound. In a covalent compound, electrons are shared between atoms, not delocalised.

4. O2(g) or Oxygen in its gaseous state is a covalent molecule. It also does not have a sea of delocalised electrons.

Which of these substances has a regular lattice of positive metal ions in a sea of delocalised electrons?Na(s)NaCl(s)SiO2(s)O2(g)

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