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7th Chemistry
7th Grade Chemistry Vocabulary
Question | Answer |
---|---|
Element | a pure substance that cannot be speartated into simpler substances by physical or chemical means |
Compound | a pure substance composed of two or more elements that are chemically combined |
Molecule | a neutral group of atoms held together by covalent bonds |
Chemical Property | a property of matter that describes a substance based on its ability to change into a new substance with different properties |
Physical Property | a property of matter than can be observed or measured without changing the identity of the matter |
Mixture | a combination of two or more substances thata are not chemically combined |
Solution | a mixture that appears to be a single substance but is composed of particles of two or more substances that are distrubuted evenly throughout the mixture |
Malleable | able to be pounded into thin sheets withoug shattering |
Ductile | able to drawn or pulled into a wire |
Soluble | the ability to dissolve in another liquid |
Conductivity | able to carry an electrical current |
Density | the amount of matter in a given space or volume; the mass per unit volume of a substance |
Chemical Change | the composition of matter changes |
Physical Change | the composition of matter stays the same but the appearance changes in some |