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Ch 3 - Matter & Ener
Chemistry I
Question | Answer |
---|---|
solid | The particles are tightly packed. |
The particles do not move around. | |
liquid | The particles are close together. |
The particles vibrate | move |
gas | The particles are very separated. |
The particle vibrate and move quickly. | |
Liquid | can be poured and take on the shape of their container. Has mass and volume. |
gas | A state of matter that has no definite shape or volume. Has a high kinetic energy. |
Matter | anything that takes up space and has mass |
atoms | basic particle from which all elements are made |
element | cannot be broken down into any other substance |
molecule | 2 or more atoms bonded (same or different) |
compound | 2 or more different atoms bonded together in a set ratio |
mixture | 2 or more substances mixed together but NOT chemically bonded |
homgeneous mixture | mixture in which substances are evenly distributed (you cannot see the different parts) |
heterogeneous mixture | mixture in which you can see the different parts |
Precipitate | A solid product that may form when chemicals in two liquids react |
Reactants | The substances present at the beginning of a chemical reaction |
Exothermic reaction | A reaction in which energy is released |
Endothermic reaction | A reaction in which energy is absorbed |
Chemical reaction | Changes the way in which atoms are arranged by causing bonds between atoms to break and new bonds to form between different atoms |
Law of conservation of mass | The law that states the mass of reactants is always equal to the mass of the products |
Products | The substances formed by a chemical reaction |
Physical Property | can be observed and measured without changing the kind of matter being studied |
Melting Point | temperature at which a substance changes from a solid to a liquid |
Boiling Point | temperature at which a substance changes from a liquid to a gas |
Chemical Property | can be observed when substances undergo a change in composition; the ability to react (combine) with another substance |
Ability to Burn | involves a substance reacting with oxygen quickly to produce light and heat |
Ability to Rust | involves a substance (iron) reacting slowly with oxygen |
Physical Properties of Matter | Melting Point; Boiling Point; Density; Color |
Malleable | |
Chemical Properties of Matter | Ability to Burn; Ability to Rust |
physical change | A type of change that involves the physical properties of a substance |
chemical change | Process by which substances are changed into different substances with different properties |
physical change | A change of the state of matter (solid |
homgeneous mixture | mixture in which substances are evenly distributed (you cannot see the different parts) and are known as solutions |
element | -cannot be broken down into any other substance |
- Made up of the same type of atoms (homogeneous) | |
-listed and classified on periodic table | |
-pure substance | |
compound | A substance made up of atoms of two or more different elements joined by chemical bonds |
mixture | 2 or more substances mixed together but NOT chemically bonded |
heterogeneous mixture | mixture in which you can see the different parts |
matter | anything that has mass and takes up space (volume) |
Solution | a homogeneous mixture of two or more substances evenly dispersed throughout |
Pure Substance | A substance with a fixed composition. Made of one type of particles. |
Compound | A substance made up of atoms of two or more different elements joined by chemical bonds |
water | compound |
dry ice | compound |
sugar | compound |
Bismuth | element |
salt | compound |
milk | mixture |
Uranium | element |
crystalline | iron |
Amorphous Solids | A solid made up of particles that are not arranged in a regular pattern |
Crystalline Solids | A solid that is made up of crystals in which particles are arranged in a regular |
Amorphous | coal |