a sample of iodine is easiest to ship as a powder because it is ││││││││, making it easy to break into small pieces.
helium is less ││││││││ than the elements that make up the air we breathe, so a balloon filled with helium will float in air.
plastic is a compound of nonmetallic elements, so its ││││││││ properties make it a popular coating for electric wires to prevent the current from escaping.

Question

Accepted Answer

### First Blank (Iodine):
# Brief Explanations:
Iodine as a solid (in powder form context) being easy to break into small pieces relates to its brittleness. Brittleness is a physical property where a solid is hard but breaks easily when force is applied, fitting the description of being easy to make into powder/small pieces.
# Answer:
brittle

### Second Blank (Helium):
# Brief Explanations:
For a balloon to float in air, the gas inside (helium) must be less dense than the air. Density here refers to mass per unit volume; if helium has lower density, it displaces air and experiences buoyancy to float.
# Answer:
dense

### Third Blank (Plastic):
# Brief Explanations:
Plastic used to coat electric wires to prevent current escape means it does not conduct electricity, i.e., it is an insulator. Insulators have high electrical resistance, blocking the flow of electric current, which matches the use case for wire coating.
# Answer:
electrical (insulating can also be thought of, but the property here is related to electrical conductivity - so "electrical" in the sense of being a poor electrical conductor/insulating; more precisely, the property is "insulating" but based on the sentence structure "its [property] properties", "electrical" (with the implied "insulating" about electrical conductivity) fits. Alternatively, "insulating" but the blank is likely expecting a term like "electrical" (since it's about preventing current, related to electrical properties) or "insulating". Given the context of electric wires and preventing current escape, the property is electrical (specifically, being an electrical insulator). So the key property is related to electrical conductivity - non - conductive/insulating, so the property is "electrical" (in the sense of electrical insulation) or "insulating". But more accurately, the property is that it's an insulator, so the blank can be filled with "electrical" (as in electrical insulating properties) or "insulating". However, the most precise term related to preventing current is "insulating" or "electrical" (with the understanding of electrical insulation). But in the context of the sentence "its [blank] properties", the property is about electrical conductivity, so the answer is "electrical" (or "insulating"). Given the standard terminology, "insulating" or "electrical" (with the meaning of being an electrical insulator). But the most appropriate term here is "insulating" or "electrical" (focusing on electrical resistance). However, the correct term for the property that makes it prevent current escape is that it is an insulator, so the property is "electrical" (in terms of electrical conductivity - low conductivity/insulating). So the answer is "electrical" (or "insulating"). But more accurately, the property is "insulating" (since it insulates against electricity). So:
# Answer:
insulating (or electrical, but insulating is more direct for the property of preventing current)

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QUESTION IMAGE

Question

Explanation:

First Blank (Iodine):

Answer:

Second Blank (Helium):