How many unpaired electrons are there in an atom of an element with the following configuration?1s2 2s2 2p6.
A.0 B.1 C2 D6 E8
looks like they are filled to me.
To determine the number of unpaired electrons in an atom, you need to identify the electron configuration of the element and evaluate the distribution of electrons in the atomic orbitals.
The electron configuration provided "1s2 2s2 2p6" represents the electron distribution up to the second energy level for an atom.
The superscript numbers represent the number of electrons present in each subshell. In this configuration, there are 2 electrons in the 1s orbital, 2 electrons in the 2s orbital, and 6 electrons in the 2p orbital.
To find the number of unpaired electrons, you need to determine if any electrons are singly occupying an orbital.
For this configuration, there are no singly occupied orbitals since each subshell is fully occupied. Therefore, the correct answer is (A) 0 unpaired electrons.