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Chem Quiz Chapter 3
| Term | Definition |
|---|---|
| WHAT IS MATTER? | anything that has mass or takes up space |
| ORGANIZATION OF MATTER | mixtures and pure substances |
| ORGANIZATION OF MIXTURES | heterogeneous and homogeneous mixtures |
| ORGANIZATION OF SUBSTANCES | elements and compounds |
| WHAT IS THE DIFFERENCE BETWEEN A GAS AND A VAPOR? | Gases are gases at room temp. Vapor is a solid or liquid at room temp. |
| WHAT ARE PHYSICAL PROPERTIES? | properties that can be measured or observed without creating a new substance |
| WHAT ARE INTENSIVE AND EXTENSIVE PROPERTIES? | -intensive: independent to amount of substance (density, spices) -extensive: dependent to amount of substance (mass, volume) |
| WHAT ARE CHEMICAL PROPERTIES? | characteristics that can be measured or observed only by trying to create a new substance |
| WHAT IS A PHYSICAL CHANGE? | -a change that affects one or more of the physical properties -can alter substance without changing its properties -includes a phase change (boiling, condensing, melting, freezing, ripping) |
| WHAT IS A CHEMICAL CHANGE? | -new substances are formed with new properties -atoms in molecules are rearranged -old bonds break, new bonds form (burning, decomp, rusting, exploding, oxidizing) |
| WHAT IS THE LAW OF CONSERVATION OF MASS? | in any reaction, mass is neither created nor destroyed (mass of reactants = mass of products) |
| LIST INDICATORS OF A CHEMICAL CHANGE. | -color change -production of bubbles -change in temperature -formation of a solid (mixing 2 liquids) -production of light, sound, or smell |
| WHAT IS A MIXTURE? | -physical blend of two or more things -can be separated physically -each substance retains individual properties |
| WHAT ARE SOME WAYS TO SEPARATE MIXTURES? | -physical sort -distillation -filtration -crystallization -sublimation -chromatography |
| WHAT ARE PURE SUBSTANCES? | -substances that have a definite composition and are uniform -pure and homogeneous |
| WHAT ARE TWO TYPES OF PURE SUBSTANCES? | -elements -compounds |
| WHAT IS AN ELEMENT? | -simplest substances which retain -building blocks to other compounds -metals, non-metals, carbon, sulfur, etc. |
| WHAT IS A COMPOUND? | -a combination of two or more elements -can only be separated chemically -properties are different than that of compound elements |
| HETEROGENEOUS MIXTURE: | -a mixture without uniform composition -individual substances are distinct -don't blend entirely -soup; concrete |
| HOMOGENEOUS MIXTURE: | -mixture that has uniform composition -all substances mix so that no substances are distinct -called a solution -tap water; air |
Created by:
mma129
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