only 2 electrons.
2 electrons in the only shell helium has.
Sulphur has 6 electrons in its outermost shell.
thallium has 3 electrons in outermost shell.
It has 5 electrons in its outermost shell.
Helium has 2 valence electrons.
There are 2 electrons in the outermost shell of strontium. Strontium has an electron configuration of [Kr] 5s^2, indicating that it has two electrons in its outermost shell.
There are 2 electrons on the outermost shell of calcium.
2 valence electrons for helium (helium has only 1 shell)
There are 8 electrons in the outer level of all the noble gases except helium. This full outer level gives them stability and makes them less reactive. Helium, as a noble gas, has only 2 electrons in its outer level.
6 electrons.
4.See the Related Questions for how to determine the number of electrons in the outermost shell of all the elements!
There is no Iodone atom, there is however an Iodine atom that has seven valence electrons or seven electrons in outermost shell.