Multiple Choice
Which of the following represents the correct electron configuration for a neutral neon (Ne) atom?
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10. Periodic Properties of the Elements
The Electron Configuration
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Which atomic symbol represents the noble gas with the electron configuration 1s^2 2s^2 2p^6?
A
Ne
B
Ar
C
Kr
D
He
Verified step by step guidance1
Identify the total number of electrons in the given electron configuration: 1s^2 2s^2 2p^6. Add the electrons in each subshell: 2 (1s) + 2 (2s) + 6 (2p) = 10 electrons.
Recall that the number of electrons in a neutral atom equals its atomic number. So, the element with this configuration has atomic number 10.
Use the periodic table to find the element with atomic number 10. This element is a noble gas located in Group 18.
Recognize that the noble gas with atomic number 10 is Neon, which has the atomic symbol Ne.
Confirm that the other options (Ar, Kr, He) correspond to different atomic numbers and electron configurations, so they do not match the given configuration.
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