http://en.wikipedia.org/wiki/Valence_shell#Valence_shells
Inner electron shells are closer to the atomic nucleus and have lower energy levels compared to outer electron shells. Outer electron shells are farther from the nucleus and have higher energy levels, making them more involved in chemical reactions and bonding with other atoms.
Chromium has two electrons in the outer most shell.
No, iodine has four electron shells, marked as "K", "L", "M", and "N". The number of electron shells is determined by the electron configuration of an element.
No. The inner shells are filled first.
Beryllium has one outer electron shell with two electrons.
Berkelium has 97 electrons, which means it has 7 electron shells.
The outer electron shells of halogens have seven electrons, making them one electron short of a full outer shell. This makes halogens highly reactive as they tend to gain an electron to achieve a stable electron configuration. Halogens are located in Group 17 of the periodic table.
The outer electron shells of the halogens typically contain seven electrons, making them highly reactive and likely to gain one electron to achieve a stable electron configuration. Additionally, halogens have a tendency to form negatively charged ions when they react with other elements by gaining one electron.
Darmstadtium has seven electron shells around the nucleus.
Sodium has 3 energy levels, 1s, 2s, 2p, and 3s.
less
Californium has seven electron shells ; the outer shell has two electrons.