Which of the following statements about the electron configuration of an atom is

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Question: Which of the following statements about the electron configuration of an atom is correct?

Options:

Correct Answer: All of the above

Solution:

Electrons fill orbitals in order of increasing energy, and the 4s orbital is filled before the 3d orbital.

Which of the following statements about the electron configuration of an atom is correct?

Which of the following statements about the electron configuration of an atom is correct?

Correct Answer: Electrons fill orbitals in order of increasing energy, and the 4s orbital is filled before the 3d orbital.

Step 1: Understand that electrons are found in orbitals around the nucleus of an atom.
Step 2: Know that orbitals have different energy levels, and they fill in a specific order.
Step 3: Learn the order in which orbitals are filled: 1s, 2s, 2p, 3s, 3p, 4s, 3d, and so on.
Step 4: Notice that the 4s orbital is filled before the 3d orbital, even though 3d has a higher principal quantum number.
Step 5: Conclude that the statement about the 4s filling before the 3d is correct.

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