Multiple Choice
Given the electron configuration of argon (Ar): [Ne]3s2 3p6, how many valence electrons does argon have?
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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
The chemical characteristics or reactivity of an element depend mostly on the:
A
number of neutrons
B
atomic mass
C
number of valence electrons
D
total number of electrons
Verified step by step guidance1
Understand that the chemical characteristics or reactivity of an element are primarily determined by how atoms interact with each other, which depends on the electrons involved in bonding.
Recall that electrons are arranged in shells around the nucleus, and the outermost shell electrons are called valence electrons.
Recognize that valence electrons are responsible for forming chemical bonds because they are the electrons that can be gained, lost, or shared during chemical reactions.
Note that the number of neutrons affects the isotope of the element but does not significantly influence chemical reactivity.
Conclude that the total number of electrons or atomic mass is less directly related to chemical behavior than the number of valence electrons, making valence electrons the key factor.
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