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Electrons and the Periodic Table

Question 6 • ***CPS Online Chemistry fall – 1-2027

Use the periodic table to identify the noble gas that would be included in the noble-gas notation for each of the following elements.Si: HeNeArKr

Answer
A
He
B
Ne
C
Ar
D
Kr

Explanation

Silicon has atomic number 14, so a neutral silicon atom has 14 electrons. Neon accounts for the first 10 electrons, making it the noble gas used in silicon’s abbreviated electron configuration, [Ne]3s²3p²; the correct choice is Ne.

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