Memory Properties of MatterVersion en ligne Match each definition with the correct vocabulary word. par Krystin Lawhorn A gas that has no color or smell and is less dense than air. It is often used to make party balloons float. Characteristics or attributes. Properties Density Sulfur Hexafluoride Helium Anything that has weight and takes up space. Solubility A property of matter that measures how close together the particles are inside a substance. This can determine things like if something will float or sink. Conductivity A property of matter that measures how well one thing can dissolve in another. A property of matter that measures how well something can allow electricity to flow through it. Matter A gas that is six times more dense than air. It is heavy for a gas and a balloon filled with it sinks.