Multiple Choice
According to the wave mechanical model of the atom, where are the electrons of an atom most likely to be found?
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10. Periodic Properties of the Elements
The Electron Configuration
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which atom has the electron configuration 1s2 2s2 2p6 3s2 3p6?
A
Sulfur (S)
B
Neon (Ne)
C
Argon (Ar)
D
Magnesium (Mg)
Verified step by step guidance1
Identify the total number of electrons represented by the given electron configuration: 1s2 2s2 2p6 3s2 3p6.
Add the electrons in each subshell: 1s2 has 2 electrons, 2s2 has 2 electrons, 2p6 has 6 electrons, 3s2 has 2 electrons, and 3p6 has 6 electrons.
Calculate the total number of electrons by summing these values: 2 + 2 + 6 + 2 + 6.
Recall that the number of electrons in a neutral atom equals its atomic number, which identifies the element.
Match the total number of electrons to the atomic number of the elements given (Sulfur, Neon, Argon, Magnesium) to determine which element corresponds to the configuration.
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