Multiple Choice
In an atom, what are the electrons located in the outermost shell called?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following best describes a valence electron and its importance in chemistry?
A
A valence electron is an electron in the innermost shell; it is important because it controls the atom's stability.
B
A valence electron is a proton in the outermost shell; it is important because it determines the atom's charge.
C
A valence electron is an electron in the outermost shell of an atom; it is important because it determines the atom's chemical reactivity and bonding behavior.
D
A valence electron is any electron found in the nucleus; it is important because it affects the atom's mass.
Verified step by step guidance1
Understand that valence electrons are the electrons located in the outermost shell (energy level) of an atom.
Recognize that valence electrons are crucial because they participate in chemical bonding and reactions, determining how atoms interact with each other.
Note that valence electrons are not protons; protons are positively charged particles found in the nucleus and determine the element's identity, not its chemical reactivity.
Remember that electrons in inner shells (closer to the nucleus) are not valence electrons and generally do not participate directly in bonding.
Conclude that the best description of a valence electron is: an electron in the outermost shell of an atom, important because it determines the atom's chemical reactivity and bonding behavior.
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