Somewhere between 1 & 8 (unless ionised - could have 0). Which atom are we talking about here? Rule of thumb (not including Lanthanide & Actanide series) - Find which column it is in on the Periodic Table of elements and that's how many electrons it will have in it's (non-ionised) state.
There is one electron on cobalts outer shell.
4V V-Valence Electrons Valence Electrons-Last electron (which is on the outer shell)
no electron is present in the outer most shell of hydrogen ion
The outer most electron shell of iodine atom contains 7 electrons.
Valence Electrons
The outer shell (N=4) of the copper element has 2 electrons.
Sodium is in the third group in the periodic table. It meens that sodium has three shell. First shell - 2 electrons, second shell - 8 electrons, third shell (outer energy level) - 1 electron.
Alkali metals have 1 electron in their outer shell.
The outer shell is called the valence shell
Carbon has four electrons in its outer shell. The electron configuration of carbon is 1s² 2s² 2p², where the two electrons in the inner shell (1s) are not counted toward the outer shell. Therefore, in the outer shell (2s and 2p), carbon has a total of four electrons.
Nitrogen has 5 electrons in its outer shell, so there are 3 electron pairs in the outer shell of nitrogen.
These are the valence electrons.