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Chemistry Test 1

Terms in this set (49)

Matter
Anything that has mass or takes up space
Chemistry
The study of matter and how matter changes
Substance
A single kind of matter that is pure meaning it always has a specific makeup or composition
Physical Property
A characteristic of a substance that can be observed without changing it into another substance
Chemical property
A characteristic of a substance that describes its ability to change into different substances
Element
A substance that cannot be broken down into another substance by chemical or physical means, elements are the simplest substances, each element can be identified by its specific physical and chemical properties
Atom
The basic particle from which all elements are made, an atom has a positively charged center or nucleus containing smaller particles
Chemical Bond
A force of attraction between two atoms
Molecules
A group of two or more atoms held together by chemical bonds, two atoms of the same element can also combine to form a molecule
Compound
A substance made of two or more elements that are chemically combined in a set ratio
Mixture
Two or more substances that are together in the same place but their atoms are not chemically bonded, each substance in a mixture keeps its own properties, they are not combined in a set ratio
Heterogenous Mixture
You can see the different parts and they can be easily separated out
Homogenous Mixture
The parts are so evenly mixed you can't see the different parts, its is difficult to separate the parts of homogenous mixture
Weight
A measure of the force of gravity on an object
Mass
The amount of matter in an object is its ______, mass does not change at any location
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