Answer:
In atomic physics and quantum chemistry , the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s 2 2s 2 2p 6, using the notation explained below.
Explanation:
i found it on google
A is the correct awnser Beacuse it ether right kne
Atomic number equals the number of protons or electrons. Atomic mass equals the number of protons and neutrons