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Chemistry
Matter/Atoms
| Question | Answer |
|---|---|
| Atom - | the smallest unit of an element that maintains the chemical properties of that element; basic building block of matter |
| Boiling Point - | temperature at which a liquid changes to a gas at a given pressure |
| Conservation- | to have change in a chemical reaction but no net gain or loss of molecules |
| Chromatography- | a method of separating a mixture made of color into the primary colors which made it |
| Decomposition- | a type of reaction in which the complex reactant breaks down into simpler products |
| Ductility - | the ability to be formed or pulled into a wire or tube |
| Electron- | the tiny negatively charged particle found in the cloud of the atom |
| Element - | a substance that cannot be separated or broken down into simpler substances by chemical means; all the same of type atoms |
| Endothermic - | during a chemical reaction energy is absorbed by the molecules of the products. |
| Exothermic – | during a chemical reaction energy is released |
| Heat - | the energy transferred between objects that are at different temperatures |
| Ion- | an atom or group of atoms that has a positive or negative electric charge from losing or gaining one or more electrons; occurs during bonding |
| Indicator- | an organic compound used to indicate the presence of a chemical. It changes color to indicate the presence of____ Ex. Hydrion paper tells if acid or base, iodine if a starch is present, phenol red if CO2 is present. |
| Mass - | amount of matter contained in a substance |
| Matter - | anything that has mass and volume |
| Melting Point - | the temperature and pressure at which a solid becomes a liquid |
| Malleability - | able to be bended, shaped, or flattened or hammered flat |
| Motion - | an object's change in position relative to a reference point |
| Neutron- | the neutral particle of an atom-found in the nucleus. |
| Particles - | a very small piece or part; a tiny portion or speck. |
| Phase - | one of the four states or conditions in which a substance can exist: solid, liquid, gas, or plasma. |
| Proton- | the positive particle of an atom found in the nucleus. Makes the element unique. |
| Pure Substance - | a sample of matter, either a single element or a single compound, that has definite chemical and physical properties |
| Saturation - | a solution that cannot dissolve any more solute under the given conditions |
| Solubility - | the solubility to dissolve in another substance |
| Solute - | in a solution, the substance that dissolves in the solvent |
| Solvent - | in a solution, the substance in which the solute dissolves |
| Solution- | a homogenous mixture in which a solute dissolves in a solvent |
| Synthesis- | a chemical reaction in which simple reactants combine to form a more complex product(compound) |
| Volume - | amount of space an object occupies |
| Mass - | a measure of the amount of matter in an object |
| Crystal Pattern - | a solid in which all the atoms are arranged in a regular, repeating pattern. |
| Evaporation - | process in which liquid water changes to water vapor with the addition of energy. |
| Filtering - | a porous material through which a substance is passed in order to separate the fluid from suspended particulate matter. |
| Heterogeneous - | a mixture that is not mixed evenly and each component retains its own properties |
| Sifting - | to separate and retain the coarse parts to remove lumps and large particles |
| Conductivity - | property of metal and alloys that allow heat or electricity charges to pass through the material easily. |
| Metals - | an element below and to the left of the stair-step line of metalloids; about 80% of the known elements are metals; metals are shiny, good conductors, low specific heat, high melting points, malleable, and ductile. |
| Model - | a standard or example used for comparison. |
| Periodic Table - | an arrangement of elements in order of increasing atomic numbers that demonstrates the periodic patterns that occur among the elements. |
| Physical Properties - | a characteristic of a substance that can be observed without changing the identity of the substance |
| Reactivity - | the ability of an atom or molecule to undergo a chemical reaction with another atom, molecule or compound. |
| Chemical bond - | the "glue" that attracts and keeps atoms held together due to sharing of each atom's electrons |
| Chemical change - | the process in which one or more substances are changed into one or more new substances |
| Chemical property - | property that can be observed only when a substance is changed into a new substance |
| Precipitate - | the solid that is formed as a result of a precipitation reaction |
| Closed System - | the reactants and products in the reaction that are contained to reduce error |
| Law of Conservation of Mass - | states that the total amount of mass and energy in the universe is conserved (does not change) |
| Products - | materials present at the end of a reaction |
| Reactants - | the starting materials in a reaction |
| Homogenous - | solid, liquid or gas that contains two or more substances blended evenly throughout. |
| Mixtures - | the physical combination of 2 or more substances; can be separated by physical means. |
| Molecule - | consisting of one or more atoms held together by chemical forces; formed by bonding |
| Compound - | a substance made of two or more different atoms |
| Density - | the measure of mass of a substance per unit volume |
Created by:
Saba Aleem
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