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It is the electron configuration of a neutral, not excited atom.
Options are not given in the question. But the following species will have the same electronic configuration as Br- ion: Neutral atom: Kr Cations: Rb+, Sr2+ Anion: Se2-
Yes, but an electron configuration could be that of an ion. The identification of an element depends on the number of protons in its nucleus, so only when the species is also neutral can the electron configuration be used to identify it. Examples 1s2 2s2 2p6 is the electron configuration of Neon but also of F-. Take the superscripts and add them together to get the atomic number and if neutral must be Neon but if negative is that of F-
Magnesium's atomic number is 12. Therefore, it has 12 protons and 12 electrons. Filling in the first 12 atomic orbitals gives us the configuration of 1s2 2s2 2p6 3s2.
The atomic number of potassium is 19. This means that potassium atoms have 19 protons in their nuclei. Neutral potassium atoms will also have 19 electrons. So then you follow the rules for the orbital filling pattern for the atoms of the elements, until you get to 19 electrons, and you get the following: 1s22s22p63s23p64s1.
Silicon has 14 electrons in the following orbital configuration 1s2 2s2 2p6 3s2 3p2, when neutral in charge.
The electron configuration for neutral Chlorine is 2.8.6.
It is the electron configuration of a neutral, not excited atom.
A neutral carbon atom has 6 electrons in the following configuration: 1s2 2s2 2p2
Electronic configuration of beryllium: 1s2.2s2.
Options are not given in the question. But the following species will have the same electronic configuration as Br- ion: Neutral atom: Kr Cations: Rb+, Sr2+ Anion: Se2-
The ground-state electron configuration for a neutral atom of manganese is: 1s22s22p63s23p63d54s2 or [Ar]3d54s2
The neutral configuration is [Ne]3s23px1 or 1s2 2s22p6 2p1 3s23px1
Calcium has the electron configuration [Ar]4s2; the neutral atom of calcium has 20 electrons.
13Al = 1s2,2s2,2p6,3s2,3p1
1s2,2s2,2p6,3s2,3p3
The electron configuration of arsenic is: [Ar]4s23d104p3.