Vocabulary
a substance that cannot be broken down into any other substances by chemical or physical means
element
a substance made of two or more elements the are chemically combined in a set ratio
compound
another word for a homogeneous mixture is
500 bonus points if you know the two separate parts that make it
solution
solute/solvent
Elements have different properties because their _________ are different
atoms
Mixtures can be easily ____________
separated
the basic particle from which all elements are made
atom
made of two or more substances that are together in the same place but their atoms are not chemically bonded
mixture
the particle theory of matter explains that all matter is made of ________.
atoms
When elements chemically combine, they form _____________ with properties _________________ from those of the elements
compounds, different
Compounds are formed as a result of
chemical combination
a force of attraction between two atoms
chemical bond
see the different parts and they can easily be separated out
heterogeneous mixture
An atom has a ____________ charged center or ______________, containing smaller particles.
positively, nucleus
elements and compounds are _____________
substances
What are two ways in which mixtures differ from compounds
Each substance in a mixture keeps its individual properties. The parts of a mixture are not combined in a set ratio
a group of two or more atoms held together by chemical bonds
molecule
The nucleus is surrounded by a "_________" of ___________ charges.
cloud, negative
Each substance in a _____________ keeps its own properties.
mixture
What is the difference between a chemical formula and a chemical symbol?
a chemical symbol is a one or two letter "abbreviation" for an element
a chemical formula represents a compound - shows the elements in the compound and the ratios inn which their atoms combine
shows the elements in the compound and the ratio of atoms
chemical formula
Another word for a heterogeneous mixture is
suspension
Each element is identified by its specific ______________ & ______________________
chemical & physical properties
Solutions can be __________, ___________, or ________.
solids, liquids, or gases
The four ways to separate a mixture is