Multiple Choice
How many inner core and valence electrons does the nitrogen atom possess?
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9. Electrons in Atoms and the Periodic Table
Valence Electrons of Elements (Simplified)
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In simplified terms, the chemical behavior of an atom is primarily determined by the:
A
total number of neutrons in the nucleus
B
number of electron shells (energy levels) regardless of electrons in the outer shell
C
number of valence electrons in its outermost energy level
D
atomic mass (average mass of its isotopes)
Verified step by step guidance1
Understand that the chemical behavior of an atom is mainly influenced by how it interacts with other atoms, which depends on its electrons, not neutrons or atomic mass.
Recall that electrons are arranged in energy levels or shells around the nucleus, and the outermost shell is called the valence shell.
Recognize that the number of electrons in the valence shell (valence electrons) determines how an atom bonds or reacts chemically with other atoms.
Note that the total number of neutrons affects the isotope and atomic mass but does not directly influence chemical behavior.
Conclude that the correct factor determining chemical behavior is the number of valence electrons in the outermost energy level.
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