Multiple Choice
Which of the following ions has the electron configuration 1s^2 2s^2 2p^6?
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10. Periodic Properties of the Elements
The Electron Configuration
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How many electrons are present in a neutral atom of silicon (Si)?
A
14
B
12
C
28
D
16
Verified step by step guidance1
Recall that in a neutral atom, the number of electrons is equal to the number of protons.
Identify the atomic number of silicon (Si) from the periodic table, which represents the number of protons in the nucleus.
Note that the atomic number of silicon is 14, meaning it has 14 protons.
Since the atom is neutral, the number of electrons must also be 14 to balance the positive charge of the protons.
Therefore, the number of electrons in a neutral silicon atom is equal to its atomic number, which is 14.
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