Chapter 17: Properties of Atoms and the Periodic Table
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Last updated 2:57 AM on 4/13/23
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26 Terms
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Nonmetals
________ are located to the right of the metalloids.
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Metals
________ are located to the left of the metalloids.
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Metalloids
________ are located along the green stair- step line.
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Quarks
________: Smaller particles that make up Protons and neutrons.
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Neutrons
________: neutral particles that do not have an electrical charge.
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Energy levels
________ are named using numbers one to seven.
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Bubble chambers
________ can be used by scientists to study the tracks left by subatomic particles.
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neutral atom
In a(n) ________, the number of electrons is equal to the number of protons.
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models
Scaled- up ________ are often used to visualize things that are too small to see.
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Isotopes
________: Atoms of the same element that have different numbers of neutrons.
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Periodic Table
________: the elements are arranged by increasing atomic number and by changes in physical and chemical properties.
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Atomic Mass
Average ________: the weighted- average mass of the mixture of its isotopes.
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electrons mass
Because a(n) ________ is small and the electron is moving so quickly around the nucleus, it is impossible to describe its exact location in an atom.
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Atom
the smallest piece of matter that still retains the property of the element
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Protons
particles with an electrical charge of 1+
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Neutrons
neutral particles that do not have an electrical charge
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Quarks
Smaller particles that make up Protons and neutrons
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Electron Cloud
the area around the nucleus of an atom where its electrons are most likely found
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Atomic Number
The number of protons in an atom is equal to a number
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Mass Number
The sum of the number of protons and the number of neutrons in the nucleus of an atom
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Isotopes
Atoms of the same element that have different numbers of neutrons
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Average Atomic Mass
the weighted-average mass of the mixture of its isotopes
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Periodic Table
the elements are arranged by increasing atomic number and by changes in physical and chemical properties
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Groups
families
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Electron Dot Diagram
uses the symbol of the element and dots to represent the electrons in the outer energy level
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Periods
The horizontal rows of elements on the periodic table
