Helium has the electron configuration 1s2
5 electrons: 1s2 2s2 2p1, so an uncharged atom would have 5 protons: Boron.
Chromium
The element with the electron configuration 1s2 2s2 2p6 is neon (Ne).
The electron configuration of an atom with the atomic number of 11 (which corresponds to the element sodium) is 1s2 2s2 2p6 3s1.
This element is chlorine (group 17).
5 electrons: 1s2 2s2 2p1, so an uncharged atom would have 5 protons: Boron.
The electron configuration provided corresponds to the element iodine (I).
Chromium
There are a total of 14 electrons in this electron configuration. The element whose atomic number corresponds to 14 is silicon.
The element with the electron configuration 1s2 2s2 2p6 is neon (Ne).
The element with the electron configuration 1s2 2s2 2p6 3s2 3p6 is Argon, which has an atomic number of 18.
The electron configuration of an atom with the atomic number of 11 (which corresponds to the element sodium) is 1s2 2s2 2p6 3s1.
Magnesium
Magnesium
Magnesium
Magnesium, Mg
This element is chlorine (group 17).