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First Semester Review

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Across
2.Two or more elements chemically combined
6.The particle in an atom that has no charge
7.An educated guess
9.The number of protons in a given element
11.Elements that are good conductors of electricity, are malleable, and ductile
12.The substances that react in a chemical reaction.
14.Atoms of a substance are all the same. Example: Hydrogen or Gold
16.Atoms of the same element with different numbers of neutrons
17.The substances that are produced in a chemical reaction.
18.A bond formed when two nonmetals share electrons
Down
1.The movement of particles from an area of high concentration to low concentration
2.The type of chemical reaction where oxygen is a reactant
3.The type of chemical reaction where two or more elements form a compound. A + B --> AB
4.The particle in an atom that has a positive charge
5.A bond formed when a metal and a nonmetal transfer electrons
6.Elements that are not good conductors of electricity, are not malleable or ductile.
8.The type of chemical reaction where on substance is broken down into other substances. AB --> A + B
10.The smallest piece of matter that still retains the property of the element.
13.The particle in an atom that has a negative charge
15.The center of an atom where you would find the protons and neutrons

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