What is the electron configuration of an element with atomic number 12?
The element with the atomic number 12 is magnesium. The atomic number indicates the number of positively charged protons in each magnesium nucleus. A neutral atom has equal numbers of protons as negatively charged electrons. The electron configuration of a neutral magnesium atom is:
The Aufbau diagram can help you determine the correct order in which the electrons will fill the orbitals in an atom.
The element with atomic number 12 is Magnesium. It has 12 electrons:
2 electrons in the 1st orbital in an s-shell
8 electrons in the 2nd orbital: 2 in an s-shell and 6 in the p-shell
and 2 in the 3rd orbital, an s-shell.
You can use the Aufbau principle to help with the order.