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How many valence electrons does the element strontium (Sr) have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Which term is used to describe the electrons located in the outermost energy level of an atom?
A
Valence electrons
B
Free electrons
C
Core electrons
D
Bonding electrons
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Understand that electrons in an atom are arranged in energy levels or shells around the nucleus.
Recognize that the outermost energy level of an atom contains electrons that are involved in chemical bonding and reactions.
Identify that the electrons in this outermost shell are called \(\textbf{valence electrons}\).
Note that \(\textbf{core electrons}\) are those found in inner shells, not involved directly in bonding.
Understand that \(\textbf{free electrons}\) and \(\textbf{bonding electrons}\) are terms used in different contexts, but the specific term for electrons in the outermost energy level is \(\textbf{valence electrons}\).
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