Matter Particle Spacing Analysis

Matter consists of particles (atoms or molecules) that are separated by spaces. The amount of space between these particles determines how tightly packed the matter is. We need to identify which substance among salt, iron, and sugar has sufficient spaces or is not tightly packed.

Particle Packing Comparison

Let's examine the particle arrangement for each substance:

• Iron: Iron is a metal and exists as a solid. In metals, atoms are arranged very closely together in a rigid structure, making them tightly packed.
• Salt: Common salt (like Sodium Chloride, NaCl) is a crystalline solid. While particles are arranged in a lattice, the packing is generally less dense than in metals. In granular form, there are air spaces between the salt crystals.
• Sugar: Table sugar (like sucrose) is also a crystalline solid. Similar to salt, its crystal structure might be less densely packed than iron. Granulated sugar also has significant air spaces between individual sugar crystals.

Conclusion on Spacing

Comparing the three, iron particles are the most tightly packed. Both sugar and salt, especially in their common granular forms, have more noticeable spaces between their constituent particles (crystals) than iron does.

Therefore, the substances with sufficient spaces between them or that are not tightly packed are sugar and salt.