Unit 1 Test

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Terms in this set (...)

Pure Substance
Has a fixed composition (either a compound or element)
Mixture
A blend is f two or more kinds of matter, each of which retains its own identity and properties
Compound
A substance that can be broken down into simple, stable substances and is compose of atoms of two or more elements that are chemically bonded
Element
A pure substance that cannot be broken down into simpler, stable substances and is composed of one type of atom
Atom
The smallest unit of an element that maintains the chemical identity of that element
Reactant
The substances that react in a chemical change (starting material)
Product
The substances that are formed by a chemical change (ending material)
Solid
Has definite volume and definite shape
Liquid
Has definite volume but no definite shape
Gas
Has no definite volume or definite shape
Plasma
High temperature physical state in which atoms lose most of their electrons
Molecule
Smallest unit of an element or compound that retains properties of that element or compound
Volume
The amount of 3D space an object occupies
Mass
Measure of the amount of matter
Matter
Anything that has mass and takes up space
Chemical
Any substance that has a definite composition
Chemistry
The study of the composition structure, and properties of matter
Change of State
A physical change of a substance from one state to another
Physical Property
A characteristic that can be observed or measured without changing the identity of the substance
Chemical Property
Relates to a substances ability to undergo changes that transform into different substance
Chemical Change
A change in which one or maybe re substances are converted into different substances
Physical Change
Change in substance that doesn't involve a change in the identity of the substance
Homogenous Mixture
Uniform in composition (looks the same)
Heterogeneous Mixture
Not uniform throughout (see layers)