Multiple Choice
How many valence electrons are available for bonding in bromine (Br)?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
Which of the following best describes valence electrons and explains their importance in chemistry?
A
Valence electrons are the electrons found in the innermost shell of an atom; they are important because they determine the atomic mass.
B
Valence electrons are the electrons in the outermost shell of an atom; they are important because they determine how atoms interact and bond with each other.
C
Valence electrons are protons in the nucleus; they are important because they define the element's identity.
D
Valence electrons are neutrons in the nucleus; they are important because they affect the stability of the atom.
Verified step by step guidance1
Step 1: Understand what valence electrons are. Valence electrons are the electrons located in the outermost shell (energy level) of an atom.
Step 2: Recognize the role of valence electrons in chemistry. These electrons are crucial because they participate in chemical bonding and determine how atoms interact with each other.
Step 3: Differentiate valence electrons from other subatomic particles. Protons and neutrons are found in the nucleus and do not directly participate in bonding.
Step 4: Note that valence electrons influence chemical properties such as reactivity, bonding type (ionic, covalent), and molecule formation.
Step 5: Conclude that the best description is: 'Valence electrons are the electrons in the outermost shell of an atom; they are important because they determine how atoms interact and bond with each other.'
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