Electron Configurations and Orbital Diagrams (EL-21)
This assessment focuses on your understanding of electron configurations and orbital diagrams for neutral atoms. Answer all questions carefully. For multiple-choice questions, select the best answer. For short answer questions, provide clear and complete responses.
Question 1
What is the electron configuration for a neutral atom of sodium (Na)?
Question 2
Which of the following neutral atoms has the electron configuration 1s2 2s2 2p6 3s2 3p5?
Question 3
How many unpaired electrons are present in a neutral atom of nitrogen (N)?
Question 4
What is the correct electron configuration for a neutral atom of magnesium (Mg)?
Question 5
Which element has the electron configuration [Ne] 3s2 3p4?
Question 6
How many electrons are in the 3p orbital of a neutral atom of phosphorus (P)?
Question 7
Which of the following is the correct electron configuration for a neutral atom of oxygen (O)?
Question 8
How many half-filled orbitals are present in a neutral atom of carbon (C)?
Question 9
Which of the following elements has a completely filled 2p subshell?
Question 10
What is the total number of electrons in a neutral atom of calcium (Ca)?
Question 11
Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1?
Question 12
How many electrons are in the 2p subshell of a neutral atom of boron (B)?
Question 13
Which of the following atoms has only one electron in its outermost shell?
Question 14
What is the electron configuration for a neutral atom of fluorine (F)?
Question 15
How many electrons are present in the 3d subshell of a neutral atom of scandium (Sc)?
Question 16
Which of the following statements is true about the orbital diagram for a neutral atom of oxygen (O)?
Question 17
How many empty 3p orbitals are present in a neutral atom of sodium (Na)?
Question 18
Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2?
Question 19
How many electrons are in the 4s orbital of a neutral atom of potassium (K)?
Question 20
Which of the following atoms has a half-filled p subshell in its ground state?
Question 21
Write the full electron configuration for a neutral atom of aluminum (Al).
Question 22
How many unpaired electrons are present in a neutral atom of selenium (Se)? Explain your reasoning.
Question 23
Write the full AND shorthand electron configuration for silver (Ag). How many partially filled orbitals are there and identify which one(s).
Question 24
How many partially filled orbitals are present in a neutral atom of phosphorus (P)? Explain.
Question 25
Write the electron configuration for a neutral atom of zinc (Zn) using the noble gas shorthand notation.
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