Multiple Choice
How many electrons are required to completely fill all five d orbitals in a given energy level?
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10. Periodic Properties of the Elements
The Electron Configuration
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Which of the following statements is correct regarding the number of electrons in potassium (K) and argon (Ar)?
A
Potassium has two more electrons than argon.
B
Potassium and argon have the same number of electrons.
C
Potassium has one more electron than argon.
D
Argon has one more electron than potassium.
Verified step by step guidance1
Recall that the number of electrons in a neutral atom is equal to its atomic number.
Find the atomic number of potassium (K) from the periodic table, which tells you the number of protons and thus electrons in a neutral atom.
Find the atomic number of argon (Ar) from the periodic table, which similarly gives the number of electrons in a neutral argon atom.
Compare the two atomic numbers to determine the difference in the number of electrons between potassium and argon.
Conclude which statement is correct based on the difference in their electron counts.
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