Chemistry Vocab List
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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Periodic Table | A chart of the chemical elements, arranged by grouping elements with similar properties.
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Reactants | Substances that may undergo a chemical change in an experiment.
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Chemical Change | A reaction that creates a new substance. Evidence by color change, making heat,gas,or a solid
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Physical Change | When a substance changes size, shape or phase but is STILL the original substance.
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Matter | Anything that contains mass or takes up space.
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Compound | A pure substance composed of 2 or more elements.
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Dichotomus Key | A tool used to categorize substances by asking questions that only have 2 choices.
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Solid | The phase of matter that has a definite shape and volume.
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Physical Properties | Characteristics of a substance that can be tested and/or observed.
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Meniscus | The curvature in a liquid noticed inside a graduated cylinder. We use the bottom of it to measure accurately.
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Participate | A new solid that is formed in a chemical reaction.
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Particle | A very small piece of matter, such as an atom.
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Element | One of a group of substances that cannot be separated into simpler substances by chemical means.
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Conservation Of Mass | Rule that states that in a closed system, even after physical and chemical changes occur, the total amount of the substances you started with equals the total amount of the substances you end with.
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Open System | An experimental set-up in which mass or energy can be lost or gained from its surrounding environment.
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Closed System | When reactions take place without the influence of outside factors. Nothing is lost or gained.
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Liquid | The phase of matter where the atoms take the shape of its container.
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Acid | A substance with a pH less than 7, has a sour taste and keeps or turn litmus paper pink.
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Gas | The phase of matter where the atoms fill the shape and volume of its container.
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Base | A substance with a pH greater than 7, feels slippery, tastes bitter, and keeps or turns litmus paper blue.
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Solubility | Capable of being dissolved or liquified.
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Atom | Smallest part of any substance that contains protons, electrons, and neutrons.
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Melting Point | Temperature at which a substance changes solid to liquid. For water its 0 Celsius.
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Litmus Paper | AN indicator tool, made of paper, that changes color in the presence of an acid or a base.
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Boiling Point | Temperature at which a substance changes from a liquid to a gas. For water its 100 Celsius.
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Neutral | Term used for a substances whose pH is 7, water is an example.
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Mixture | A combination of substances that can be separated by physical means.
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pH (scale) | A way of expressing how acidic or basic a substances is on a scale from 1-14.
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Pure Substance | Any single type of matter that cannot be separated by physical means.
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Blue | This color on litmus paper indicates a base.
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Freezing Point | Temperature at which a substance changes from a liquid to a solid. For water its 0 Celsius.
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Red/Pink | This color on litmus paper indicates an acid.
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Polymer | A long molecule made of a paper chain of smaller, more simpler molecules.
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Exothermic | A chemical reaction which releases heat.
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Or sort by any of the columns using the down arrow next to any column heading.
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