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Chemical Interactions - Atoms, Molecules, and Phase Changes

Across
Phase change where a substance changes from a liquid to a gas.
The state of matter in which the molecules slide past each other and move at a medium speed.
Something that can be observed and studied that is unusual or difficult to understand.
Phase change where a substance changes from liquid state to solid state.
The amount of matter or stuff that makes up and object.
Information gathered through measurement or calculation.
A negatively charged particle found on the energy levels around the nucleus.
The variable you change and test in an experiement
Something that is made of two or more things that are mixed together physically.
A state of matter in which both the shape and volume are definite.
Two or more atoms of an element chemically combined.
A code that tells scientists the number of atoms of each element that go in a molecule or compound.
A positively charged particle found in the center of an atom.
Phase change where a substance changes from a gas to a liquid.
A claim or reasonable explanation based on our past experiences and our observations.
Down
A substance made of two or more different elements chemically combined in a specific ratio or proportion.
Information gathered using our 5 senses.
Neutral (no charge) particles that make up the center of an atom.
Anything that has mass and takes up space.
Phase change where a substance changes from solid state to liquid state.
The state of matter that has indefinite volume and shape and in which the molecules move very fast with the highest energy.
A particle smaller than an atom.
Information gathered through observation that describes the quality of an object: color, shape, texture - not measured or numerical.
A pure simple chemical that cannot be broken down into any other substances. It only has one kind of atom.
The force of attraction that holds two atoms together to make a molecule or compound.
Any basic unit of matter.
Phase change where a substance changes from a gas to a solid.
Phase change where a substance changes from a solid to a gas.
Describes how much potential a physical system has to change; energy exists in many forms.
The smallest possible unit of a chemical element.