Name the element which has the electron configuration below:
Lithium (Li)
Calcium (Ca)
Sodium (Na)
Oxygen (O)
Oxygen (O)
The element with the given electron configuration is Oxygen (O).
To determine the element with a specific electron configuration, we need to understand the arrangement of electrons in an atom.
The electron configuration is a way to represent the distribution of electrons in the different energy levels (or electron shells) around an atom's nucleus. It follows a specific notation that includes the energy level (n), the type of orbital (s, p, d, f), and the number of electrons in that orbital.
Let's analyze the electron configurations given:
Lithium (Li): 1s² 2s¹
Calcium (Ca): 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Sodium (Na): 1s² 2s² 2p⁶ 3s¹
Oxygen (O): 1s² 2s² 2p⁴
Looking at the electron configurations, we can see that the element with the given electron configuration is Oxygen (O). Oxygen has 8 electrons, and its electron configuration is 1s² 2s² 2p⁴.
Therefore, the element with the given electron configuration is Oxygen (O).