| Term | Definition |
|---|
| carbohydrate | A_________ is an organic compound used by cells to store and release energy. |
| mixture | A _________s a combination of two or more substances that can be separated by |
| homogeneous | A ____________--mixture is two or more substances that are evenly mixed on the |
| solution | A ________ is a homogeneous mixture formed when a solute dissolves in a |
| alloy | A solid solution known as an ________ is a mixture of a metal and one or more |
| heterogeneous | In a__________-- mixture, the substances are not evenly mixed |
| concentration | The ____________ of a solution is exactly how much solute can be dissolved in a |
| "Like dissolves like." | A simple rule for solubility is _______________ |
| . Ions | __________in solution are responsible for the ability of a solution to conduct electricity |
| acid | An __________is a substance that releases a positively charged hydrogen ion, H+, in |
| base | . A ________is a substance that produces hydroxide ions when dissolved in water |
| diatomic | . A _____________ molecule is a molecule that contains two atoms. |
| law of conservation of energy | The_____________ states that energy is neither created nor |
| exothermic | An ___________ process releases energy. The products of an exothermic process |
| endothermic | __________process absorbs energy; the reactants have less energy than the |
| periods | . There are seven horizontal rows of elements, called _________ |
| groups | There are 18 vertical columns of elements on the periodic table, called______ |
| Metallic | . _________properties are the collective properties of common metals. If an element |
| halogens, | The most reactive nonmetals, called _________ are found in Group 17 on the |
| noble gases. | Elements in Group 18 on the periodic table are known as the___________They |
| . Radioactive decay | ________________, or radioactivity, occurs when an unstable atomic nucleus |
| Transmutation | _______________ occurs when an atom of one element is changed into an atom of |
| half-life | The_________of a radioactive isotope is the time it takes for a sample of that isotope |
| physical property | A ______________is any characteristic of a material that can be observed |
| vaporization | The change from a liquid to a gas state is called __________ |
| evaporation. | Vaporization at the surface of a liquid is _____________ |
| condensation. | The state change of a material from a gas to a liquid is called _____________- |
| Sublimation | ___________-is the change of a solid to a gas without going through the liquid state. |
| ionic | An__________ bond is an electrical attraction between positively and negatively |
| valence | . The number of electrons in an atom's outermost energy level is its_________-- |
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