Multiple Choice
The average oxygen atom has a mass number of 16 and an atomic number of 8. This means that the number of neutrons in this oxygen atom is:
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2. Cell Chemistry & Cell Components
Atoms- Smallest Unit of Matter
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many electrons does an Oxygen atom need to fulfill the octet rule by filling its valence shell?
A
8.
B
4.
C
1.
D
2.
E
6.
Verified step by step guidance1
Understand the octet rule: Atoms are most stable when they have eight electrons in their valence shell, resembling the electron configuration of noble gases.
Identify the number of valence electrons in an oxygen atom: Oxygen is in group 16 of the periodic table and has 6 valence electrons.
Calculate the number of electrons needed to fulfill the octet rule: Since oxygen has 6 valence electrons, it needs 2 more electrons to reach a total of 8.
Consider the options provided: The correct answer is the number of electrons needed to complete the octet, which is 2.
Conclude that an oxygen atom needs 2 additional electrons to fulfill the octet rule and achieve a stable electron configuration.
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