객관식
How does an oxygen atom obey the octet rule in most of its compounds?
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11. Bonding & Molecular Structure
Octet Rule
객관식
In accordance with the octet rule, which of the following atoms is most likely to form an ion with a -1 charge?
A
Ne
B
Na
C
Mg
D
Cl
검증된 단계별 안내1
Understand the octet rule: atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons, which is a stable electronic configuration similar to noble gases.
Identify the electron configurations of the given atoms: Ne (neon) is a noble gas with a full octet, Na (sodium) has 1 electron in its outer shell, Mg (magnesium) has 2 electrons in its outer shell, and Cl (chlorine) has 7 electrons in its outer shell.
Determine the tendency to gain or lose electrons based on their valence electrons: atoms with nearly full outer shells tend to gain electrons to complete the octet, while those with few valence electrons tend to lose them.
Since Cl has 7 valence electrons, it is most likely to gain 1 electron to complete its octet, forming an ion with a -1 charge (Cl⁻).
Ne is already stable with a full octet and typically does not form ions; Na and Mg tend to lose electrons to form positive ions (Na⁺ and Mg²⁺ respectively), so they are unlikely to form a -1 charged ion.
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