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:
a) 24.
b) 8.
c) 16.
d) 4.
e) 2.
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3. Chemical Principles of Microbiology
Atoms- Smallest Unit of Matter
Multiple 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.
A
8.
B
4.
C
1.
D
2.
E
6.
Verified step by step guidance1
Understand the octet rule: Atoms tend to gain, lose, or share electrons to achieve a full set of eight valence electrons, resembling the electron configuration of a noble gas.
Identify the atomic number of Oxygen: Oxygen has an atomic number of 8, which means it has 8 electrons in total.
Determine the electron configuration of Oxygen: The electron configuration is 1s² 2s² 2p⁴, indicating that Oxygen has 6 electrons in its valence shell (2s² 2p⁴).
Calculate the number of electrons needed to fulfill the octet rule: Since Oxygen has 6 valence electrons, it needs 2 more electrons to complete its valence shell and satisfy the octet rule.
Conclude that Oxygen needs 2 additional electrons to achieve a full octet in its valence shell.
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