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Chapter 2.1
Review cards for Section 2.1
20
Science
9th Grade
10/08/2014

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Cards

Term
chemistry
Definition
The science of what matter is made of and how it changes is called ___>
Term
element
Definition
A substance that cannot be broken down into simpler substances is an ___.
Term
Homogeneous
Definition
If you put 1 gram of salt into 1 liter of water and stir, the resulting liquid is an example of a ___ mixture.
Term
11
Definition
How many oxygen atoms are in one molecule of sugar, C12H22O11?
Term

Hydrogen

Oxygen

Definition
The chemical formula for water, H2O, means that each water molecule contains 2 ____ atoms and 1 ____ atom.
Term
elements
Definition
Aluminum, oxygen, and carbon are examples of ____.
Term
oxygen
Definition
The chemical symbol O stands for the element ___.
Term
2
Definition
Each molecule of iron oxide, Fe2O3 contains ___ atoms of Fe.
Term
heterogeneous
Definition
A mixture of flour and water is called a ___ mixture because the substances do not dissolve.
Term
it doesn't have mass or take up space
Definition
Why is light not a form of matter?
Term

element

Compound

Definition
Name the 2 types of pure substances
Term
particles are close together and in fixed positions
Definition
How do molecules in a solid differ from those in a liquid or gas?
Term
element
Definition
A substance that cannot be separated or broken down into a simpler substance
Term
Chemistry
Definition
The scientific study of the composition, structure, and properties of matter and the changes that matter undergoes.
Term
matter
Definition
Anything that takes up space and has mass
Term
atom
Definition
The smallest unit of an element that maintains the properties of that element
Term
Compound
Definition
A substance made up of atoms of two or more different elements that are chemically combined.
Term
Chemical Formula
Definition
a combination of chemical symbols and numbers to represent a substance
Term
pure substance
Definition
A sample of matter, either a single element or single compound, that has chemical and physical properties.
Term
mixture
Definition
A combination of two or more substances that are not chemically combined.
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