Multiple Choice
A proton ___________:
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2. Cell Chemistry & Cell Components
Atoms- Smallest Unit of Matter
Multiple Choice
A neon atom (Ne) is unreactive for which of the following reasons?
A
It has 7 valence electrons.
B
It has 8 valence electrons.
C
Its valence shell is full of electrons.
D
It has 20 valence electrons.
E
b and c only.
Verified step by step guidance1
Identify the atomic number of Neon from the periodic table image, which is 10. This indicates that a neutral Neon atom has 10 electrons.
Understand that Neon is a noble gas, which means it is located in Group 18 of the periodic table. Noble gases are known for their lack of reactivity due to their full valence electron shells.
Determine the electron configuration of Neon. With 10 electrons, Neon fills the first energy level with 2 electrons and the second energy level with 8 electrons, resulting in a configuration of 1s² 2s² 2p⁶.
Recognize that the second energy level is the valence shell for Neon, and it is full with 8 electrons. This full valence shell is what makes Neon unreactive.
Conclude that the correct reasons for Neon being unreactive are that it has 8 valence electrons and its valence shell is full of electrons, corresponding to options b and c.
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