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Which of the following substances can be broken down into simpler substances by chemical means?
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1. Intro to General Chemistry
Chemical Properties
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An element's chemical properties and reactivity are primarily determined by which of the following?
A
The atomic mass
B
The number of valence electrons
C
The number of energy levels
D
The total number of neutrons
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Understand that an element's chemical properties and reactivity depend on how it interacts with other atoms, which is largely influenced by the electrons involved in bonding.
Recall that electrons are arranged in energy levels (shells) around the nucleus, but not all electrons contribute equally to chemical behavior.
Identify that valence electrons are the electrons in the outermost energy level of an atom and are primarily responsible for chemical bonding and reactivity.
Recognize that atomic mass and the number of neutrons affect the physical properties and stability of the atom but do not directly determine chemical reactivity.
Conclude that the number of valence electrons is the key factor that determines an element's chemical properties and reactivity.
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