2
2 valence electrons for helium (helium has only 1 shell)
Helium (He) and Calcium (Ca) both have 2 valence electrons.
2 valence electrons for helium (helium has only 1 shell)
2 valence electrons
2.You are in terrible need of a periodic table. It's really not that difficult, and it's well worth learning.
8 electrons (except for helium which has 2)
2 electrons in the only shell helium has.
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.
Nitrogen has five electrons in its outer shell and bromine has seven in its outer shell.
Vanadium has on the outer shell two electrons.
Boron has three electrons in its outer shell
Calcium has two electrons in the outer shell.