Multiple Choice
Which of the following is the correct electron configuration for a neutral calcium atom?
3
views
10. Periodic Properties of the Elements
The Electron Configuration
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 is the electron configuration for which element?
A
Magnesium (Mg)
B
Potassium (K)
C
Sodium (Na)
D
Calcium (Ca)
Verified step by step guidance1
Identify the electron configuration given: $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$.
Count the total number of electrons by adding the superscripts: $2 + 2 + 6 + 2 + 6 + 1$.
Recall that the number of electrons in a neutral atom equals its atomic number.
Match the total number of electrons to the element with the corresponding atomic number on the periodic table.
Confirm that the element with this atomic number is Potassium (K), which has atomic number 19.
Related Videos
Related Practice
The Electron Configuration practice set
Problem sets built by lead tutorsExpert video explanations