Question

question 42

when atoms of most materials combine to form molecules, they arrange themselves in a manner that produces a total of how many valence electrons?
a. six
b. two
c. four
d. eight

Explanation:

Identify the core chemical principle

The question asks about the number of valence electrons atoms tend to acquire or share when they combine to form molecules. This behavior is governed by a fundamental concept in chemistry known as the octet rule.

Analyze the octet rule

The octet rule states that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.

Evaluate the given options

• a. six: Incorrect, as this does not represent a full outer shell for most main-group elements.
• b. two: Incorrect, although hydrogen and helium follow a "duet rule" (two valence electrons), the question asks about "most materials."
• c. four: Incorrect, as this represents a half-filled valence shell for main-group elements.
• d. eight: Correct, as this directly corresponds to the stable octet configuration that most atoms seek to achieve when forming chemical bonds.

Answer:

• a. six
• b. two
• c. four
• d. eight (Correct answer)