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Where are valence electrons located in an atom?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Why are valence electrons important in chemistry?
A
They are responsible for the color of an element.
B
They are found only in noble gases.
C
They determine how an element reacts and bonds with other elements.
D
They control the atomic mass of an element.
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Understand that valence electrons are the electrons located in the outermost shell of an atom.
Recognize that these electrons are the ones involved in chemical reactions because they can be gained, lost, or shared to form chemical bonds.
Know that the number and arrangement of valence electrons determine an element's chemical properties and how it interacts with other elements.
Note that valence electrons do not control atomic mass, which depends on protons and neutrons, nor are they responsible for color or exclusive to noble gases.
Conclude that valence electrons are important because they determine how an element reacts and bonds with other elements.
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