Chemistry Chapter 1 - Kory Parsia
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Last updated 5:57 PM on 10/21/22
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16 Terms
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proton
A positively charged particle located in an atom's nucleus
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neutron
A particle that has no electric charge and is located in an atom's nucleus
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nucleus
The central region of an atom where most of the atom's mass is found in protons and neutrons
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electron
A negatively charged particle located outside an atom's nucleus. An electron is about 2000 times smaller than either a proton or neutron
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atomic number
The number of protons in the nucleus of an atom
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atomic mass number
The total number of protons and neutrons in an atom's nucleus
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isotope
An atom of one element that has a different number of neutrons than another atom of the same element
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ion
An atom or group of atoms that has a positive or negative electric charge
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atomic mass
The average mass of the atoms of an element
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periodic table
A table of the elements, arranged by atomic number, that shows the patterns in their properties
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group
A vertical column in the periodic table of the elements. Elements in a group have similar properties
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period
A horizontal row in the periodic table of the elements. Elements in a period have varying properties
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reactive
Likely to undergo a chemical change
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metal
An element that tends to be shiny, easily shaped, and a good conductor of electricity and heat
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nonmetal
An element that is not a metal and has properties generally opposite to those of a metal
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metalloid
An element that has properties of both metals and nonmetals
Note 
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